My Deltarune Theory.
Ok guys this is a long passage so prepare yourselfs. I have a theory that in the Deltarune world, so hear me out ok?
My theory is that Kris is dead. And I believe this because in chapter 1 Kris falls into the dark world but that's when he dies. But the soul takes over Kris and is why after that point we have control over Kris.
Also the dark world is Kris's imagination. I'm pretty sure your like "of course it is, it's an illusion." Yeah but what if it wasn't darker then dark, what if it was Kris's imagination. What if when he goes into the closet he hits his head on something knocking him out causing him to hallucinate.
And for people? Susie is Kris's rebellion, Noelle is Kris's kindness, and birdly is Kris's smarts. Even the bosses are Kris, King is Kris's loss over control, queeny is Kris trying to be perfect, Tenna is Kris's false happiness, and The Titan is Kris themselves, Jevil is Kris controlling the dark world, Spamton is Kris wanting to be free from the Player, The Roaring Knight is Kris fighting back against the soul (which is why the player is weaker against the Roaring Knight) and Gerson is Kris knowing the truth behind it all. And lastly, Ralsei is also Kris themselves, that's how Ralsei knows so much about the soul, is so weak, can go into any dark world, and looks like Torial and Asgore.
And at night is one of the few times we don't control Kris so the real Kris controls themselves which is why they walk so weird.
Also in chapter 3 when Susie talks to Tenna if you do certain actions you can see what Susie tells Tenna and it's exact. That's because for something to happen Kris has to imagine it happening.
Tell me if I'm wrong but there seems to be enough evidence to back me up. Also don't judge if it's a bad theory I was chocking on hot sauce when I thought of this.