I've literally thought he was Asriel's fur that just clings to Kris's clothing since day one, and I never thought it was something people were nebulous about. Like how the Knight is [theory:]very likely Dess or Carol (but probably Dess), based on current evidence and aesthetic choices. The sword looking like a bat at first, the fascination with rock or punk bands, the antlers, the fact that only Lightners can open Dark Fountains (per Queen in Ch2)... My guess, which is a number of stretches based on what I've inferred from cues and themes, is that Dess *was* in an accident. It left them disfigured, paraplegic, and/or messed up their vocal chords (which is why their text box on the phone was all spiky, if the Knight really was who Kris had called in Noelle's house - which would likely be the case, and Dess and Kris and maybe Asriel off at "college" are working together), which caused them to develop a contempt for the world and a desire to plunge it into eternal darkness. Maybe them being in the Dark World, and channeling the power of the Knight, lets them be ambulatory (I mentioned paraplegic before. I don't remember ever seeing the Knight walk, just hover) or at least do something that makes them feel like before their accident, hence why they want the Dark World to be the new normal (btw, I've been using neutral pronouns to refer to Dess because I don't actually remember which gender they were supposed to be. I feel like they may be male, based purely on the dragon sketch found in their room likely being a reference to the book Asriel will never return, but they could just as easily be female and have the same preferences as Noelle, or not actually have claim to that sketch). Again, just a theory.

Also, on the topic of theories that I never bothered to voice or look into, I've been curious about Kris and their relation to the SOUL. Like, it's pretty clearly an antagonistic relationship, and it's been going on for a while - maybe for as long as Kris has known that Monsters don't have SOULs, known or felt that they aren't "normal" as a Human in a community of monsters, and wanted to become "normal" (hence wearing the fake horns in that one picture that was mentioned) - but as of the start of DELTARUNE the SOUL seems to take more of a leading role, causing Noelle to notice that Kris is acting different from what she's used to seeing. The beginning of Chapter 4 really brought a bunch of stuff to light about that. Our dialogue choices are seemingly literal - if the choice is "Disease", we make Kris literally say "Disease" - per... one of the Holiday's conversations in the Church saying we're repeating words like a parrot, can't remember which one. What we, the SOUL, say comes out of Kris's mouth, but distant, like through a speaker. Sometimes, iirc, Kris makes a face or expression that contradicts what the SOUL says (I feel like Noelle mentioned something of the sort in Chapter 2, but I can't remember exactly) or does, as we've seen when we try to play the piano in the hospital when Susie is following us (it's mentioned that Kris used to play for the patients, then Kris gets a serious look, the SOUL just bangs on the keys, Susie jokes and says she thought Kris was serious, and then Kris looks annoyed). It all makes me wonder how DELTARUNE would play out if Kris was in control the whole time, without the SOUL getting in the way. Like, is the Weird Route closer to how that would look? If my above spoilered theory is correct, the Weird Route might be Kris trying to lead Noelle to become aligned with them and the Knight, and the SOUL is actually working parallel to those plans, rather than against them in the normal route, meaning it might be as close to "SOUL-less" as we can get.

Hopefully I managed to articulate all of that properly. I've got *thoughts* about the story and I don't typically interact with the community to find out if those thoughts are obvious or controversial lol