Rounding out the cast are Flandre (a diminutive android maid who can only say "fugah"), Riza (a werewolf halfbreed who originally comes in search of the Princess for revenge), Reiri (a local vampire who just likes stirring up trouble), and occasionally the Princess' sister, Sherwood.
Making appearances are the Princess and Sherwood's other siblings, locked in a deadly competition to take the family throne. Even though she has no interest in the throne she is forced to fight them regardless, along with the many monsters who have designs on her family's special blood.
This series has the blessing of Universal Pictures (the Japanese branch was a sponsor of the anime) and so can use everything from classic Universal monsters to Back to the Future. Which they have.
An OVA of Princess Resurrection was later announced
in 2010 and much to the delight of the fans, it was more faithful to the manga (both visually and tonally), had much better animation and all of the blood was retained.
In November 2017, a sequel series named Princess Resurrection Nightmare was released, appearing to feature the cast sometime after the end of the first series.
There's a Spin-Off manga called Naqua-Den that stars Nakua, the spider deity that partners with Hime.
This series provides examples of:
- Aborted Arc: The manga set up an arc involving the ancestors of the vampire race and an Eldritch Abomination hidden alongside them in an underground cave, but it's ultimately left unresolved.
- Alien Abduction: In one story, Buchi is possessed by an alien entity that kidnaps Hime to use her as a source of power to its UFO.
- Alliance of Alternates: In the final battle of the manga, Hiro uses his powers as a Fire Warrior to ask for the help of every alternate version of Hime seen throughout the story so they give their power to the present Hime and help her defeat Silvia.
- All Just a Dream: The episode "Princess Coma" has the characters trapped in a collective dream. They're aware of it but can't wake up.
- Alternate Self: An arc dealing with Elder Things and a time bomb resulted in two Himes. One in the present and one thrown in the future. The latter eventually figures out how to undo things and make her future not happen.
- Alternate Timeline: A second timeline is created when Hime is teleported to nine years in the future after an explosion at her mansion. She manages to contact Hiro in the past through a cellphone to change the timeline so her other self doesn't end up in the future as well, but Hiro's encouragement helps Hime get the motivation to continue her journey through the future she has been thrown into. Apparently, Hiro can sense it when the Hime of the other timeline is in danger.
- Amnesiac Hero: The entire cast experiences this at the start of Nightmare. They're mostly brought up to speed by Flandre, but don't know what happened to cause it.
- Anachronic Order: The manga generally moves forward in a linear fashion, but between major arcs the chapters jump around in non-linear fashion (and some minor but long arcs are interleaved with one another and random Monster of the Week chapters). This gets more pronounced the later in the series you go.
- And the Adventure Continues: In the final battle with Silvia, Hime overwhelms and cancel out her powers, stripping away both their powers. Due to this, both are no longer declared royals and finally free of the royal battle. Sherwood is deemed the winner by default. Silvia and Fuhito go on to lead their own lives and Hime moves into another mansion along with Riza (who was banished from werewolf society for socializing with a vampire), Reiri (who was allowed to stay within hers but choose to stay with her friends), Flandre, Hiro and his sister Sawawa (still clueless as ever to the supernatural goings-on). Though the fight is over, Hime knows it'll start up again someday and, even though she no longer has to participate, starts to make plans to aid Sherwood when the time comes.
- Art Evolution: The character designs get a little looser as the manga goes along.
- Ascend to a Higher Plane of Existence: In chapter 58, it's revealed that shortly before his death, Emil seemed to have done some form of this, to put a stop to the Royal fights. He's still not an adult though.
- Asian Fox Spirit: Hime's group runs into a group of malevolent, shapeshifting fox spirits a couple of times.
- Attempted Rape: In Chapter 24, a corrupted prison guard tries to rape Hime until she's fortunately saved by Hiro and the mole man who helped him escape his cell.
- Avenging the Villain: One late story in the manga has the wife of the pharaoh Hime previously defeated come after her to take revenge.
- Back-to-Back Badasses: Happens sometimes when Hime is fighting alongside someone, such as Hiro.
- Badass Family: Riza, her brother and her father. Also from what we see in the 2nd and 3rd OVA, Hime came upon her fighting skills honest. Her brothers (excluding Severin) and sisters all kick ass.
- Bad Future: There's a timeline where Hime got caught up in an explosion at her mansion and somehow ended up nine years into the future. After using a cellphone to call Hiro in the past and give him the instructions to change the timeline, Hime continues surviving in the hostile future while the main timeline continues its own separate path.
- Bat People: The ancestors of the modern vampires look like giant humanoid bats.
- Battle in the Center of the Mind: The final battle of the manga is a battle inside Silvia's mind. Having figured out that phoenixes can absorb each other to become one entity, Silvia assimilates Fuhito and then goes after Hime. Silvia loses the battle after Hime overpowers her.
- Big Creepy-Crawlies: Chapter 18 has Hiro and Riza trapped in an underground maze where they're attacked by giant insect monsters that were created by the Fly Man.
- Big Fancy House: Hime and her retainers live in a huge mansion.
- Big, Screwed-Up Family: Most of the Royals are constantly trying to kill each other.
- Bland-Name Product: Hime owns a truck of the brand "Izuzu".
- Blonde, Brunette, Redhead: Hime is the blonde, Reiri is the brunette and Riza is the redhead.
- Blood Knight: All werewolves. It's mentioned they view close-quarters combat as "play".
- Blood Magic: A Royal's blood can turn other beings into semi-immortals when they drink it, although they need to keep drinking it regularly to stay alive.
- Bloodless Carnage: The anime doesn't depict any blood during the action scenes. They don't even use the Blood Magic.
- Body Backup Drive: The Serial Killer Magao Hibe was said to be immortal because he kept coming back for victims after he was confirmed dead. Turns out someone cloned him countless times and that's how he became "immortal".
- Brain in a Jar: The Professor is a very big brain inside a lab vat, with what appears to be extensive cybernetic enhancements.
- Cain and Abel: The royal siblings are awfully competitive, even attempting to kill each other for the throne.
- Cannot Cross Running Water: Vampires such as Reiri are unable to cross rivers and bodies of water.
- Captain Ersatz: The very concept of Blood Warriors is a blatant take-off of the Wu from 3×3 Eyes, with Hiro standing in as a younger, wimpier Yakumo. Or to be more general, Vampire creating human servant/renfield. It's actually lampshaded by hiro as he thought Hime is a vampire at first.
- Captain Obvious: Buchi, Hiro's friend from school.Gillman:"Not good! I'm stuck in a bottomless swamp!"
Buchi:"Oh no! One of our guides has gotten stuck in a bottomless swamp!" - Chained Heat: In Chapter 15, frenemies Riza and Reiri are handcuffed together as they infiltrate Kiniski's territory and are forced to fight a Cyclops while still chained to each other.
- Chainsaw Good: Chainsaws are Hime's iconic weapon.
- Charge-into-Combat Cut: Done frequently, mostly because the group has to figure out exactly what they are fighting. By the time they do, the chapter nearly over.
- Chekhov's Gun: Even if the series seems like it's packed with Monster of the Week filler, almost NOTHING that happens in it doesn't come back later in the series.
- Cherry Blossoms: In Chapter 61, Hime keeps seeing a cherry blossom tree through the window of her mansion even though there isn't such a tree in her garden. Turns out it's a tree she saw as a child when staying at a Japanese inn.
- Creepy Changing Painting: In chapter 48, Hime, Hiro, Riza and Sawawa are lured into a strange mansion that displays a large portrait of people giving cheers at a party. Whenever Hiro sees the portrait again, he sees that one of the girls has been added to it and for some reason, the girls turn murderous as if some evil force in the house was controlling them.
- Creepy Doll: In Chapter 61, Hime digs up a doll that she left buried under a cherry blossom tree. Instead of the prince doll she left at the place, she finds a creepy Japanese doll that had its head cut off.
- Dancing Theme: Riza is depicted dancing in the ED.
- David Versus Goliath: Flandre defeats a Godzilla-type monster by breaking its little toe.
- Defeat Means Friendship: Most of the main characters join Hime and Hiro after being defeated by them.
- Demonic Possession: In Chapter 59, Riza and Reiri are possessed by evil spirits that got summoned by a ritual to summon the dead.
- Didn't Think This Through: Riza's invasion of Ducaine's mansion would have gone a lot smoother if she had stopped to listen to anything that Reiri said.
- Dirty Cop: In one story, a corrupt cop is in cahoots with a Serial Killer that keeps killing girls in the area.
- Dirty Coward: Severin. Just seeing that his sister is willing to stand up to him is enough to make him panic.
- Does This Remind You of Anything?: Basically each time Hiro gets a...donation of blood from Hime or Sherwood he has to suck it from them in a bit of a suggesting way really.
- The Ancient Spider Deity will protect any humans that worship her, as long as the humans will make sacrifices to her (that was the reason she conflicted with Reiri and Riza at the school). When a super storm threatens the city, the Spider deity is waiting to get more presents in her Shrine to do something about it. Given she provides a service to the human community, in return that community owes her both respect and sacrifices. She has the same mentality that a Yakuza boss.
- Dual Wielding: In chapter 11, Hime dual wields two chainsaws to fight off the pharaoh.
- Elixir of Life: Later in the manga, Fly Man creates a secret formula named trioxon which can revive the dead.
- Eldritch Mooks: Hime and her allies journey to her lake house, where they are attacked by a group of Deep Ones. They succeed in pulling Hime's house into the lake, and demand that she give them the semi-immortality that she is known to be capable of granting. When she explains that they have to die to recieve the gift, they hesitate, until a member of the group, standing as tall as the cliffs, accuses her of lying. Unfortunately for him, Liza offers to be Hime's proxy in the proposed fight, and it's a full moon, meaning she's unstoppable. However, Hime dismisses her grievance with the Deep Ones and they vow to be her allies in battle.
- Emergency Transformation: Hime resurrects Hiro as a Blood Warrior after he was hit by the station wagon that swerved into him after Flandre got in front of it.
- Enigmatic Minion: Flyman, Mad Scientist, has won Zeppeli's recognition as a brave operator. He is onto something, but nobody is sure what.
- Epic Flail: Hime uses a flail to fight werewolves.
- Eviler than Thou: Vampires and Nobles who think nothing of feasting on humans are horrified that anyone would think of unleashing the Zombie Apocalypse.
- The Ever-Calm:
- Hime never loses her cool in a dangerous situation. Indeed, she always seems to have an innate knowledge of any monster she might be up against, and their weaknesses and the means of defeating them.
- Zapelli is noted for being eccentric amongst vampires. He is Affably Evil, and unfailingly polite. He never loses his cool when his plans are undone, nor does he vent his frustrations on his subordinates, though he does show mild irritation at fellow vampire Sanagida's overly ambitious service. In one anime-only story, when dealing with a Tanuki turned vampire hunter, Zapelli orders Sanagida to send the Tanuki packing, but "be polite about it."
- Extranormal Prison: Chapter 24 takes place at a prison for monsters, such as vampires and werewolves.
- Family Eye Resemblance: All members of the royal family have red eyes.
- Family Theme Naming: The robot "siblings" have names such as Flandre, Francisca, Flanders, Franz, Francette, Fratellus and Frank.
- Fanservice: Besides blood, the OVAs are packed to the brim with Male Gaze and breast bouncing, though they also include some Female Gaze in the 3rd OVA.
- Fantastic Racism: Between Riza and Reiri, and vampires and werewolves in general. Riza herself is subject to some very cruel prejudice from full-blooded werewolves, who regard her as a "stinking half-human bastard."
- It should be noted that Riza's brother was willing to give his life for her, and that the only werewolves shown to be cruel to her were the trio who broke the taboo about becoming Blood Warriors, and a group in a monster prison whose respect she quickly earned.
- The Werewolf men always recriminate Riza that she is allied to a vampire, Sherwood exclaimed that she cannot believe she was helping a vampire, and Gilliam mocked Hime because she chose Reiri as a servant. Keiza claimed that supremacist vampires, if not controlled by blood, are not only incompatible as servants but dangerous to royalty. Riza, who knows Hime and Reiri's relationship, calls Hime “eccentric”. It seems that in the Monster Kingdom, everyone thinks of vampires as selfish jerks who only look after themselves. To be just, all the vampire characters that we have seen so far (Zeppeli, Duke Kiniski and Caroline Lugosh) were portrayed like that, but Reiri has been kind with the school girls even before she met Hime, (she doesn’t want to transform them into vampires, and when the old spider deity threatened them, Reiri defended them).
- It has been said several times in the manga that Reiri is an outcast from the vampire society. Reiri seems to be the exception to the jerk vampire rule.
- First-Episode Resurrection: Hiro dies at the start of the first chapter and Hime gives him some of her blood to revive him as a Blood Warrior.
- Flirty Voice Ploy: Reiri uses the flirty voice ploy to draw in Hiro in order to turn him. She's also quite flirtatious with Hime when planning to drink her blood.
- Flying Saucer: In Chapter 65, an alien's space craft shaped a flying saucer is found inside an underground cave.
- Four Is Death: The Kamisou Clan Massacre occured during April of 1929, the fourth month of the fourth year of the Showa era.
- Ghost Ship: In Chapter 14, Hime, Hiro and Riza end up on board of a ghost ship filled with undead beings.
- Ghost Train: In Chapter 39, Hiro and Buchi get dragged into a mysterious train filled with ghosts.
- Giant Spider: Nakua has two giant spider familiars.
- Giant Squid: The giant octopus in chapter 84. It was originally masquerading as a sea serpent. It surrenders peacefully.
- Gondor Calls for Aid: In chapter 86, when Hiro sees Hime losing the Battle in the Center of the Mind against Silvia and Fuhito, he decides to traverse the series' timeline and acquire help from all of the Himes who died such as the pod-person Hime, the Bad Future Hime and the Bad Past Hime. It works and Hime overwhelms Silvia.
- Grievous Harm with a Body: In Chapter 15, Riza and Reiri are handcuffed together during their fight against a Cyclops and Riza throws Reiri's body at the enemy monster, much to the vampire's dismay.
- "Groundhog Day" Loop: The Yozakura arc features a Pocket Dimension where fox spirits have created a repeating loop where they reenact the Kamisou Clan Massacre that happened in 1929.
- Hammerspace: Various articles in Hime's arsenal of often-unconventional weapons.
- Harem Genre: Subversion. While Hiro is surrounded by many attractive girls, he doesn't get real Ship Tease with anyone other than Hime.
- Headless Horseman: There is a headless horseman in both the manga and the anime. Both were a result of an empty suit of armor/ghostly horseman getting its head stolen and running amuck looking for it.
- Hellish Pupils: Hime and all the other Royals have slitted pupils. Blood Warriors, and notably Hiro, also get them when entering a combat trance (triggered by their master/mistress being in mortal danger).
- Hoist by His Own Petard: Duke Kiniski. He imprisoned Hime's sister Silvia and drank her blood for his own pleasure (via a tap implanted in her body), but ended up as a Blood Warrior as a result. When Silvia manages to free herself from captivity, he's left without a blood source and ends up as a shriveled corpse.
- Homoerotic Subtext: Riza and Reiri's vitriolic relationship gives vibes of Belligerent Sexual Tension at times. Scenes like them falling on top of each other while chained together and Reiri biting Riza are heavy on the homoeroticism.
- Hooks and Crooks: The Serial Killer of Chapter 54 uses hooks to kill his victims and then hang them inside an underground cave.
- Horsemen of the Apocalypse: In Chapter 60, a horseman of the apocalypse appears leading The Legions of Hell. Fortunately, Hime manages to negotiate with the army's scout to send the horseman and his army away, thus preventing the end of the world.
- Horse of a Different Color: The heroes ride undead pandas.
- Hot Springs Episode: Chapter 41 has Hime and her friends visit a hot springs inn that turns out to be a trap from the kitsune.
- How We Got Here: The manga opens with Hime reanimating Hiro's corpse. The story then jumps back to reveal how he died.
- Humongous Mecha: Flanders is a giant mecha, unlike the rest of his android "siblings".
- I Am X, Son of Y: "I am Riza Wildman, Daughter of the Werewolf Warrior Borg Wildman!!" Doubles as her Catchphrase. It seems all werewolves do this as an introduction.
- Idiosyncratic Episode Naming: "Princess This-Or-That". The pun is more obvious in Japanese, since Hime's name means "princess".
- Immortal Life Is Cheap: Because of being a semi-immortal Blood Warrior, Hiro dies. A lot.
- Future Hiro trades his regenerative ability for a single indefinite lifespan. However, he compensates for the loss of his Death Is Cheap ability by taking several levels in Badass—enough to take on Madeline and Silvia by himself—thus making sure his life won't come cheap. Much to the surprise of Hime and the readers
- Improbable Weapon User: Hime. Rapiers and flails are archaic, but relatively normal. Chainsaws are less so. Jackhammers and candelabra are much less so and a hospital defibrillator attached to a robot girl's battery are in a whole other ball park.
- Innocence Fetish: Reiri Kamura prefers to drink the blood of virgin girls, often relying on volunteers from her classmates at the school she attends with Hiro. She even notes, teasingly, that Liza's blood is a virgin's blood, and once drank blood from a cut on Sawawa's finger, saying it confirmed a suspicion that Reiri had about the live-in maid.
- Intangible Time Travel: In Chapter 42, the Professor sends Hiro to the past by putting him inside a car driven at 88 miles per hour by Flandre. However, only Hiro's spirit goes to the past while his body stays in the present. The Professor and the invisible assassin is the only ones who can see and hear Hiro's spirit in the past.
- Invisible Jerkass: An invisible assassin appears to target Hime in a couple of chapters.
- It's All My Fault: Reiri tricks Hiro and bites him. Riza chases after Reiri. When Reiri escaped Riza and Hime told her that Hiro could die, she screamed this phrase.
- Job Title: Hime is the Monster Princess of the Japanese work's title.
- Kaiju: The Godzilla-like monster that attacks the Professor's lab in Chapter 32.
- Kiss of the Vampire: It's not real clear on it, but judging by Riza's and Hime's reactions to Reiri biting them, they looked like they were enjoying being fed upon.
- Lady and Knight: Hime is the elegant royal lady and Hiro as her Blood Warrior who is loyal to her and fights to protect her.
- Limited Wardrobe: Pretty much everyone, but especially Hime, who always wears the same outfit.
- Lizard Folk: One story arc features lizardmen that replaced the entire population of one town.
- Location Theme Naming: Nakua's spider familiars are named Taromaru and Jiromaru. These are also the names of two mountains in Kyushu, Japan.
- Lovable Coward: Reiri will use all of her powers as a vampire to flee from fights. In her defense, she always heads straight for any non-combat solution to their current problem. It's not out of fear; but rather practicality. She isn't as good at combat. This tends to irritate Riza; but that's a perk for Reiri.
- Magic Meteor: One late story arc from the manga features a meteor that changes Earth's ecosystem around it and creates Starfish Aliens.
- Magic Skirt:
- Hime, no matter what she's doing, no matter how precarious the situation, or even how undignified the position she winds up in (like thrown over an android's should, for instance), she will never fall victim to a panty shot. Reiri, on the other hand...
- Reiri flies in a skirt, but her panties aren't shown anywhere in the TV series. We do see her panties in the manga and OVAs, though.
- Malevolent Masked Men: The manga has several Serial Killers that wear creepy masks.
- The Man Behind the Man: The hospital director is a subordinate of Zeppeli.
- Marshmallow Hell: Sawawa hugs her brother Hiro to her boobs in the last chapter.
- Meido: Hiro's sister, Sawawa works as a maid at Hime's mansion. The trope's invocation is even pointed out in the translation notes of the first volume of the manga, as she goes to a cafe on her downtime while still in her costume.
- Mind Hive: There's only one phoenix. The winners of every generation of Royals, their mothers, father, aunts, uncles, whoever are absorbed into the Phoenix's collective consciousness.
- Mistress and Servant Boy: Hime and Hiro are bound together by a blood pact that turned him into a Blood Warrior meant to protect her, which also results in them forming a master-servant relationship.
- Monster Lord: The Royal Family rule over all monsters.
- Monster Mash: Practically every known monster in the book and then some. One chapter even dealt with ''pod people''. Not to mention the member of the Great Race of Yith who briefly turns up.
- Monster of the Week: Early chapters have Hime, Hiro and their allies fight a different monster each chapter.
- Mooks: A typical tactic of the villains is to swarm their adversaries with mooks, whether of the mummy, zombie, or vampire variety.
- Moving-Away Ending: In the final chapter, everyone moves out of Hime's mansion after her disappearance from her final battle with Silvia. Hiro and Sawawa move to a new mansion where they have been hired to work as servants. There, they reunite with Hime, Flandre, Riza and Reiri, thus continuing their lives together while waiting for the next royal battle to begin once again.
- Mummy: A chapter has an army of mummies attack Hime's mansion.
- Must Be Invited: Reiri required an invitation to enter Hime's home, but was free to enter at will once that invitation was given. This trope also came to bite Duke Kinski in the butt, when he seeks to replenish his supply of Royal Blood using Hime's corpse, only to find out that she's alive and well, and denying him entry to her home. Even needed an invitation to enter a long-abandoned cabin that obviously had no inhabitants or owners.
- Mystery Episode: In the Yozakura arc, Hime gets trapped in a spiritual plane where malevolent spirits keep replaying a murder mystery that they want Hime to solve.
- Near-Death Experience: Chapter 33 has Hime trapped in the limbo after she nearly dies in a car accident.
- No-Damage Run: Hiro survives alone for nine years to protect Hime without dying once.
- Oculothorax: In Chapter 53, the city is engulfed by a sentient typhoon that displays one single giant eye at the eye of the storm.
- Offscreen Moment of Awesome: The manga just loves these, with whole chapters building up to potentially-epic confrontations between the main characters and their enemies... only to show the aftermath of said encounter a page later without missing a beat.
- Ominous Clouds: Hime's mansion is always surrounded by a mass of swirling black clouds in an otherwise clear sky. It is also under constant attack from all manner of monster.
- One-Word Vocabulary: Flandre and all of her android siblings only say one word: "Hooba" ("Fuga" in the original).
- Open-Fly Gag: Reiri tells Hiro that his fly is open during their first meeting. She then zips him up right in front of everyone at their school.
- Orochi: One short arc has Hime, her retainers and Nakua fight an eight-headed evil snake god that captured and replaced the citizens of an entire town. However, fighting it becomes complicated because the snake can regenerate its heads after these are cut off.
- Our Mermaids Are Different: Hime's group encounters a little mermaid inside a ghost ship, although this mermaid has human legs because she gave up her voice in exchange for them.
- Our Souls Are Different: Literally for Royals. It's not the blood and flesh that makes a Royal special but the Royal themselves that make it special.
- Our Vampires Are Different: Vampires seem very old school, but not everything is known about them yet. They don't like sunlight, but it only seems to weaken them at most. The same goes for water, though they can't cross it. They can be killed with a stake, but crosses and churches have no influence over them. Biting infects the victim, who behaves more like a zombie than a vampire. They like blood, but it doesn't seem that they need much of it. They can fly, and they can turn into a swarm of bats, as well as communicate with regular bats.
- Our Werewolves Are Different: Werewolves can be hurt by silver, have Voluntary Transformation and heightened senses, and their strength is tied to the phase of the moon. Riza is different in her own right because she's a Half-Human Hybrid. So far, the only difference is that she can only transform her forearms and isn't quite as strong, but still pretty badass.
- Overdramatic Dating Commotion: Downplayed. Thinking that Hiro is going out with Reiri, the boys in his school shoot daggers at him.
- The Phoenix: Royals such as Hime are actually premature phoenixes, although they look completely human until only one of them is left and takes the form of a true phoenix.
- Power Dyes Your Hair: Blood warriors change hair colors when they sense their master is in danger and need to protect them.
- Pronoun of the Dreaded: One monster faced by Hime and her group is known only as "It". "It" is an amorphous shape with far too many eyes and spidery legs that can inhabit human hosts and suck their lifeforce dry.
- Proud Warrior Race Guy: Riza, who wears her father's race and name as a badge of honor in spite of being a "filthy half-human". Most if not all werewolves also seem to fit this trope.
- Psychic Link: The royals and blood warriors share some sort of mental link. When their master is in danger, they will know.
- Recurring Element: The Mermen appear in several stories throughout the series.
- Refuge in Audacity: How does Reiri get away with sucking her classmates' blood? She just calls it a "special ceremony" and sucks it from their fingers. One of her "victims" even inadvertently lampshades it. She does this in front of Hiro no less, who is shocked and amazed.
- Resurrective Immortality: The blood warriors, most noticeably the protagonist Hiro. When a person dies, one of the royal siblings can bring them back to life with their blood. This makes the blood warriors semi-immortal; when killed, they will come back to life, and even non-fatal wounds will heal quickly. However, there is a price to pay: the blood warriors have to drink royal blood every few days or they will die for real. So they have to follow, and fight for, one of the royal siblings to survive. And of course, they have to die before they can become semi-immortal to begin with.
- Returning the Lost Child: In an anime-only segment, a tankuki who came to hunt vampires (and was clearly woefully unprepared for the task) finds a lost crying child and Hiro witnesses the tanuki try to help the child find the young boy's mother, showing Hiro that the tanuki isn't a bad fellow, just misguided. Resident vampires Reiri and Zapelli come to the same conclusion and arrange for the tanuki to "kill" Zapelli so that the tanuki can claim the reward and go home to his family.
- Ridiculously Human Robot: Flandre and most of her siblings are very human-like despite being robots. Emil's android Flanders is not subject to this because he's a Humongous Mecha.
- Robo Family: Each of the royal siblings have their own android who are also called siblings.
- Robot Maid: Flandre and her sisters are maids built to serve each of the royal siblings.
- Scenery Porn: The alien infestation of chapter 76 is breathtaking.
- Serial Killer: The story of Akasabi Town is about Hime and Hiro getting trapped in a mysterious village where a serial killer has been killing many young girls and is now targeting Hime.
- Shoo the Dog: Hime and Emil subtly do this to Hiro, Keziah and the mermaid Madeline so they won't have to be involved in the war between Hime, Silvia and Fuhito.
- Shout-Out: The series loves referencing classic sci-fi/horror books and films:
- Hime's resurrection spell is an affectionate shout out to H. P. Lovecraft's works.
- Sherwood has a bunch of Romance of the Three Kingdoms references, ranging from her Zhuge Liang fan to the sworn pandahood.
- The One-Word Vocabulary of the android siblings could be a shout out for Foobar. Makes sense consider its use and derivation.
- The recharging station Flandre uses is remarkably similar to the ones used by The Borg.
- There's a bug-headed scientist, a la the original The Fly.
- Chapter 13 features a monster designed along the same lines as the imfamous Rat-Bat-Spider from The Angry Red Planet.
- A member of the Great Race of Yith appears in one chapter as an assassin.
- A squid creature judge in chapter 23 bears an uncanny resemblance to the Venusian from It Conquered the World.
- Trioxin is used to reanimate very dangerous zombies.
- Chapter 32 features a classic Godzilla style Kaiju.
- Chapter 35 is a massive shoutout to Jeepers Creepers.
- The Professor invented a car that can travel time when it goes 88 miles per hour, just like in Back to the Future.
- One of Hime's brothers tries to destroy Flanders with a megapartical cannon in chapter 39. Flanders responds with a Photon Cannon.
- In chapter 48, there is a scene that involves an axe, a door and Sawawa that's an obvious reference to one of the most iconic scenes of The Shining. The painting in the entrance of the spooky mansion also resembles the photo that appears at the end of said movie.
- In chapter 53, Buchi compares a supernatural typhoon to Laputa from Gulliver's Travels.
- The whale bus of chapter 57 may be lifted from a series of pictures from 1899-1910 imagining France (and the rest of the world) in the year 2000 (the last image in particular).
- Chapter 59 has a tape recorder and possessed bodies, referencing the Evil Dead.
- The ghost story of Okyo and the broken plate is based on the Japanese folk story Bancho Sarayashiki.
- Chapter 70 has a Pyramid Head Captain Ersatz.
- Another one from chapter 70 will seem familiar to fans of Cyborg 009.
- In chapter 72, there's mention of a Shoggoth and what appears to be a Sarlacc.
- Sylvia and Fuuhito are last seen eating at Cafe Nyarlathotep.
- In one episode, while driving along the road, Riza, Hime, and Hiro encounter a bridge that is out, its girders twisted upward towards the road, reminiscent of the bridge being out in the first The Evil Dead film.
- Slave to PR: The Royal Family plays with this. Reiri and Riza converse on this trope when they realize all the royals live in mansions in the top of a hill—the Royals not only have to win, they must display courage and fitness to rule, so they need to show no fear... but they send assassins to dispose of one other. This leads to awkward family dynamics, in that even when one of them claims to feel no hostility towards the others, they're not believed. And yet it's necessary for them to be admired among the monsters: when Reiri asks Riza if she would follow a cowardly Hime, Riza immediately answers "No".
- The Slow Path:
- Flandre stays behind when the crew goes to the past and deactivates. Back in the present, they find her and take her to her creator to be repaired.
- When Hime is trapped in the Bad Future, Reiri decides simply to survive long enough to find her and tell her what happened, so they could tell their present selves.
- Stable Time Loop: One chapter had Hiro test for a time travel experiment and ended up in the past as a ghost as a side effect. Despite being told not to interfere with anything (even though it seems he couldn't anyway since he was a ghost.) He manages to save a young Hime from an assassination attempt by her older brother. Ironically, the older Hime remembers the encounter. Additionally, Hiro plants the idea in past-The Professor's head to make a time machine and will thus choose Hiro to take the test in the future.
- The Starscream: Vampires are notoriously this; everyone is rather surprised at how loyal Reiri is to Hime; if playful. Most of Hime's enemies are shocked that she's trusting one.
- Stealth Pun: In the final episode of the anime Flandre acts hostile and rebellious towards the entire cast and almost brought danger towards the town. It wasn't until Prince Emil tightened the bolt on Flandre's head that she returned to normal. The joke? Flandre had a screw loose!
- Stock Ness Monster: Lake Kutsushara has a monster known as Kusshi.
- Succession Crisis: Most of the royal siblings are fighting each other to see who will take the throne. Hime wants nothing to do with it, but unfortunately that doesn't stop some of her more determined siblings from coming after her.
- Super-Powered Robot Meter Maids: Flandre and all her siblings are robots built to serve as maids/butlers to the Royals. Justifed in that the androids were built specifically for heavy combat. The maid part is secondary, and Flanders subverts the trope all together being a Humongous Mecha.
- Swan Boats: In Chapter 5, Hime and Riza ride a swan paddle boat while escaping from the mermen.
- Temporal Paradox: One is created when a bomb sends Hime nine years into the future and she makes a phone call to Hiro in the past to prevent said explosion from happening, thus resulting in two timelines existing at the same time. Eventually, Hime, Hiro and Reiri from the new timeline are transported to an alternate version of Sasanaki Town where they stay trapped for nine years until they reach the future the other Hime is in. Once they do, the Hime from the past disappears as there can only be one Hime in the timeline and Hiro goes to protect the Hime from the future. Hime, Hiro and Sherwood then decide to send another bomb to the past so it explodes at the same time as the other one and they cancel each other out, thus making the explosion never happen and fixing the paradox.
- There Can Be Only One: Every new generation of Royals must kill each other off until only one is left to Ascend to a Higher Plane of Existence.
- This Is a Drill: Francette, one of Flandre's sisters, loses an arm. Due to a lack of appropriate replacement android parts, she now has a drill for an arm.
- Time Travel: Hime and her retainers get sent 2,000 years in the past by a vengeful spider deity. They manage to go back to the present thanks to Flandre, who however has to stay behind. When they are back, they see a shrine that wasn't there before: it was erected to house the powered-out Flandre.
- Title Drop: Some characters refer to Hime as "Monster Princess" (Kaibutsu Oujo in Japanese).
- Tomato Surprise: Hime and her siblings are actually immature phoenixes. The reason they must kill each other is that as adults they cannot die and there must be only one living royal from each generation; otherwise the kingdom falls into chaos.
- Traintop Battle: In Chapter 40, Hime and Reiri face Gilliam on top of a moving train.
- Truer to the Text: Unlike the TV series, the 2010 OVA's are more faithful to the spirit of the manga and the characters more accurately resemble their manga counterparts.
- Underwater Ruins: In chapter 57, Hiro, Riza, Flandre and Francisca explore an ancient underwater temple.
- Vampire Detective Series: At chapter 53 of the manga, Reiri invokes this subtrope:Reiri: You're right, this requires my skills as a Detective.
- Vampiric Werewolf: Ducaine kidnapped many werewolves and forced the vampire Zeppeli to transform them, thus creating an army of werewolf-vampire hybrid monsters.
- Walk, Don't Swim: Androids are too heavy to swim, so Flandre and Francisca walk along the seabed when they go underwater.
- We ARE Struggling Together: After Dr. Franken explains to the Big, Screwed-Up Family that there is a threat they must fight it together, this trope is enacted in full force.
- Weirdness Censor: Not only is the entire town seemingly ignorant of the weird happenings of the series, but Hiro's sister Sawawa is completely oblivious to all this, despite being part of the house's staff.
- Wham Episode: Chapter 56 Emil was turned into a blood warrior by Silvia and ends up killed. His whole guard has been decimated and his mermaid given away to serve Silvia.
- Chapter 58: The soul of Emil tells Hime to become the next ruler.
- Chapter 70: The truth of the previous round of fighting is revealed and that there's a new royal sibling in the mix, one more powerful than all of them and who's already wiped out one generation of opponents.
- Chapter 77: Gilliam dies, leaving the battle count down to four. He, like Emil, wishes for Hime to be the next ruler. Sherwood says the same thing (though she gets better). What's more, Silvia now knows of Hime's power.
- Chapter 83: We learn that the winners of the succession battle are absorbed into the Phoenix's Mind Hive, Silvia has seemingly killed or absorbed Fuhito with her powers and Hime and Emil (by way of Keziah) make their Blood Warriors into Flame Warriors, thus ending their dependence on their particular Royal.
- Year X: In the chapter where Hiro receives a call from the Hime of the Bad Future, he gives the present date as "X day of X month of X year".
- Zombie Apocalypse:
- Severin breaks the rules of the royal selection by unleashing zombies into a town and then frames Hime for it to take her to trial.
- Silvia has the Fly Man create a substance that can raise the dead from their graves and uses it to reanimate the corpses at a local cemetery.