teehee here's a deltarune theory and it contains spoilers for the ending lol
so I've seen a few people (YouTubers cough cough-) think it was Chara at the end who had done the whole soul thingy. i was playing deltarune and so when you save for the first time instead of saying th name you chose it says "kris" which mean't kris saved before in the deltarune universe.
so we know only minor details about kris and have no clue what they thought about characters before, which makes me think its actually just kris at the end who has regained control over their actions and can act on however they'd like so uh
eeeee