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Deltarune: Fate Reclaimed by SillySebastian is a Deltarune fanfic on YouTube.

Starting as some loosely connected ASMR Videos, it eventually developed into a series where Lis^note Short for “listener” has been inserted into the plot as an Original Character. It chronicles their attempts to make things better for everyone they care about by learning about the situation and acting accordingly.

Tropes

• Abhorrent Admirer: The SOUL is this for Lis, being completely enamored by all the possibilities a new character has to offer.
• Adaptational Badass:
  • Kris is able to SAVE and LOAD without the SOUL, though they have to die to do it. They morbidly described everyone’s reaction to stabbing themselves to death when explaining this to Lis.
  • Implied with the SOUL, who seemed ready to fight Lis before reloading a save. This is in contrast to it being mostly helpless against Kris in the canon version of that episode’s events.
• Adaptational Expansion: Kris told Lis several details about their first meeting with the SOUL and how the power to SAVE and LOAD works.
• Adaptational Heroism: Downplayed. Kris has yet to be portrayed with the same Ambiguously Evil qualities as their canon counterpart and the SOUL’s Adaptational Villainy means that their hostile treatment of it is completely justified. 
• Adaptational Nice Guy: Sans’ canon counterpart is subject to debate on how rude he is, but even the best interpretation is unlikely to match up with the person who comforted Lis after the disaster that was their time at Noelle’s place.
• Adaptational Villainy: Played with. The series portrays the SOUL as an unambiguously evil being that’s implied to have forcibly merged itself with Kris’ soul and hides its immense sadism behind a thin veneer of heroism. In canon, however, the SOUL had initially planned on inhabiting a vessel built for it and was forced to settle with Kris. Additionally, while the player certainly has the option to be just as evil as it, they also can choose to genuinely be as heroic as it pretends to be.
• Affably Evil: While it remains to be seen if it’s a facade, Carol was complimentary of Lis’ role as Noelle’s friend and acknowledged that Lis coming to her house to cheer up Noelle was for the best, letting them off with a warning. Said warning had them fearing for their life as, while she said they’d always be welcome there, it was “only with [her] explicit permission and only if [they] keep any snooping to a minimum” and grabbed their face while forcing them to agree. Dreadful to be sure, but certainly preferable to killing them like everyone thought she would.
• Allegorical Character:
  • The SOUL is representative of every player who is perfectly fine with using the world of Deltarune as their personal playground, not acknowledging the people they hurt as more than toys they can do with as they please.
  • Lis seems to embody the people who want to get to know the characters and protect them, as well as their disgust for players who hurt the characters.
• All-Loving Hero: Lis makes friends easily and is pretty good at bringing out the best in everyone around them.
• Ambiguous Gender: Lis, which is quite common for the genre.
• Ambiguously Human: While Lis is unambiguously human and footage of their parents showed that they both looked like humans, there are hints that neither of them are and it’s unclear if this would make them adopted or a Half-Human Hybrid. 
  • Lis is consistently described as the only human in town besides Kris, which wouldn’t make sense if Vince was human. He also says that monsters can’t get human illnesses because “we’re different species.”
  • In the footage depicting Lis’ mother fighting off a bunch of mysterious foes, their SOULs are all shown. And while said foes have an assortment of the SOUL colors we’ve come to expect from the setting… hers is black. Whether this means she’s inhuman or is more akin to the ones with other colors unseen in canon is unknown.
• Aside Glance: Queen’s reaction to Ralsei asking what she meant by an “audience” was to wink at us.
• Audience Surrogate: Downplayed. Lis has a personality, appearance and something resembling a backstory but they’re still the protagonist of an ASMR Video who’s clearly meant for the audience to project themselves onto.
• Berserk Button: The SOUL’s is Implied to be being told that their choices don’t matter, as they’re clearly still holding it against Susie.
• Cannot Tell a Lie: Subverted. Despite having a Blue SOUL of Integrity, Lis is capable of deceit. It just causes them immense agony.
• Creepy Child: The series proves that Kris deserves their reputation as this by describing everyone’s reaction to them stabbing themselves to prove the existence of SAVING and LOADING to Lis in great detail while clearly amused.
• Dramatic Irony: Knowledge of canon Deltarune will leave the viewer understanding the situation more than the characters most of the time.
• Even the Loving Hero Has Hated Ones: Lis hates the SOUL for what it did to Noelle in another timeline, causing some uncharacteristically aggressive moments from them.
• Foil: Lis and Kris. Both of them are always gender neutral terms but while Lis’ gender is simply ambiguous Kris is indicated to actually be non-binary. Both live with just one parent because of a messy situation that’s currently a mystery but Asgore is still around trying to woo a clearly uninterested Toriel and Kris may or may not know the details while Lis’ mother has disappeared off the face of the earth and is a Trauma Button for Vince, with Lis going past “unaware of what happened”” by seemingly having some sort of Perception Filter surrounding her. Kris is a creepy Jerk with a Heart of Gold while Lis is a nice All-Loving Hero. Kris is revealed to have had supernatural powers before the events of Deltarune and has already gone through at least two chapters by the start of the fic^note To say nothing of their canonical experience with a knife while Lis is quickly thrust into the plot with no real experience with the supernatural or even fighting in general. Both are implied to be among the only humans in town but Lis is shown to be a lot better at making friends. Also, while both have overturning the prophecy as a major goal, Lis has been shown to be outright Immune to Fate while Kris is literally forced to play his role as “the cage” for the SOUL. And on a meta level the player thought that they would be able to name their character only to be forced to be Kris, which contrasts with Lis’ seemingly lacking a name in-universe. There also isn’t anyone to contest Lis’ role as the “protagonist” like the SOUL does for Kris.
• Faux Affably Evil: The SOUL gives off the presence of an Ideal Hero who saves everyone they can while leading the Three Heroes. In reality, they see the people around them as nothing more than playthings and occasionally go back to the “save” where they instead took the Weird Route.
• Foreshadowing: 
  • The way “Kris” was talking about various things when first meeting Lis made it pretty clear it was actually the SOUL and that this was not a benevolent portrayal of them well before the real Kris made that clear.
  • Kris (or the SOUL) dropped an old TV off at Noelle’s place, hinting that Tenna was there for some specific purpose. Turns out he was spying on them and this led to Susie’s Out-of-Context Eavesdropping. 
• Go Through Me: When the SOUL tries to advance toward Noelle after its failed attempt to possess Lis, Lis is able to shake out of their trance in time to force it back and get Noelle out of Dess's bedroom for her safety.
• Heroic Willpower: Lis was able to fight off being possessed by the SOUL.
• Hypocrisy Callout: During a small argument before the feast, when Susie points out that whether or not Lis wants to join the Dark World adventures is their choice alone, Kris bluntly reminds her that she's one to talk, considering she told Kris that "[their] choices don't matter" in the first place. This takes her aback, but she counters by pointing out the life-threatening danger Noelle and Berdly wound up in as to why she's cautious about Lis signing up for the hero act.
• I Let You Win: Despite saying she wouldn’t hold back, Susie very much lost to Lis on purpose.
• Immune to Fate: There’s something... off about Lis’ connection to fate, to say the least. It’s like they’re an “outsider” that fate was completely unaware of when it was written.
• Keeping Secrets Sucks: Lis really wants to tell Noelle about everything but promised not to and it eats away at them.
• Long-Range Fighter: When Lis first enters the Dark World, they're revealed to have a bow and arrows as their weapon of choice, formed from a rubber band and several paper balls from their pocket.
• Missing Mom: The situation behind Lis’ mother is probably the most prevalent mystery added to the series, with there being a whole section dedicating to them looking through the attic for clues about her that left them with many questions and very few answers. 
• Mood Whiplash: After a brief argument between Kris and Susie and the former shown Fighting from the Inside, the conversation quickly flips to them asking if she really puts pineapple on pizza, to which she counters with comical annoyance that it isn't that bad and snarks that they got brainwashed by the internet.
• Mysterious Past: Lis’ situation is... suspect, to say the least. For example: There are implications that they don’t have a last name and numerous mysteries surrounding their Missing Mom with no answer in sight, up to what seems to be some kind of Perception Filter preventing them from seeing her name and face.
• No Name Given: Lis, to the point this page has to use a Fan Nickname (albeit one with Approval of God) just to talk about them. There are even hints that they don’t have a last name.
• Oh, Crap!:
  • Lis realizing that the SOUL can read their mind.
  • Lis when encountering Carol at Noelle’s house.
• Original Character: Lis, their dad Vince and the people in the clips with their Missing Mom are all original to the series.
• Out-of-Context Eavesdropping: Susie was listening in on Lis and Noelle, only to storm out in frustration at the exact wrong time to make it seem like Lis stole Noelle away from her when they didn’t.
• Ripple-Effect-Proof Memory:
  • Kris is able to remember every timeline the SOUL put them through and their own resets.
  • Averted with Lis, who does not remember resets.
• Ship Tease: 
  • Lis has this with Kris, Ralsei and Noelle to varying extents. Deconstructed with Noelle, who they ship with Susie and ended up having Susie see what looked like them stealing Noelle away from her.
  • The SOUL also has something along the lines of this with Lis… unfortunately for them.
  • There are hints that Vince and Toriel are in a relationship.
• Shout-Out:
  • When looking through Lis’ DVDs for Christmas movies, Noelle mentions that she always wanted a certain toy gun, declares that her favorite is The Solar Express and expresses confusion about how what’s clearly an action movie is grouped with the others. They end up watching The Solar Express.
  • In a later episode Noelle picks out two video games to potentially play with Lis: A Disguised Horror Story that initially seems like a dating sim where the protagonists are in a writing club but quickly goes off the deep end or a blue haired guy with pigtails investigating their apartment. It’s unclear which one they end up picking.
• Sick Episode: Lis has one early on in the series, and though they insist to Vince that they'll be fine, they accept Noelle going out of her way to look after them for the day.
• Soft-Spoken Sadist: The SOUL, when their Faux Affably Evil mask slips, comes across as this.
• Trauma Button: Lis’ Missing Mom is this for Vince for unknown reasons, to the point he had a nervous breakdown just from being asked about her.
• Voice of the Legion: The SOUL when not possessing Kris, likely as a reference to their nature as an Allegorical Character for much of Deltarune’s playerbase.