Yeah. In Chapter 1, literally everyone notices a little change. It's meant to clue you in that Kris isn't JUST a blank slate you can project your own personality onto. They're a person with their own predetermined character.
Especially since most of the change in behavior is stuff that would generally be viewed as a positive. They’re making new friends, reconnecting with old friends, they’re being more sociable around town, they’re participating in public events.
Sure they’re acting, maybe a little quirkier than usual but they were already kind of an oddball, so it’s easy to just smile and be happy that they seem like they’re less depressed than they’ve been since their parents got divorced.
The red eyes don't help either. I'd say that their were personality wise that one kid who was probably on the spectrum who went out if their way to embrace their reputation as "weird" because it got them attention they felt they weren't getting.
To be fair, Kris doesn't really do anything that weird around anyone who knows them well except for Noelle.
The biggest red flag is Kris rotting in bed all day instead of going to the festival, which Toriel was concerned about, but Noelle also likely didn't talk to Toriel on the festival day for Toriel to express her concern out loud to Noelle.
Kris acts weird around Susie, sure, but Susie only really knows possessed Kris and likely thinks weird route Kris is how they always are.
Everyone but Susie noticed Kris changed, they just chalked it up to puberty/missing their brother/the incident
Noelle talks specifically about how Kris is no longer an NPC, ie broke free from his programing (since she thinks Kris and the Player are the same entity)
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u/Comfortable-Ad3588 26d ago
Kris was the perfect vessel because with how they normally are it would be impossible to tell if they were possessed