obligatory reminder that it’s two thousand fucking eighteen and we’re not going through this goddamn discourse again, so: kris is canonically non-binary and no their clothing, body language, or choice in shampoo does not prove at all that they’re actually a boy
Whatever kind of person Kris is, and however much agency they’re left with, one thing we know for sure is that they really did grow to care about Susie on their own:
since they do all these things without prompting from the player.