Poor girl, according to my anime cliche knowledge, she probably lashes out and acts unfriendly as a defense mechanism and/or because of the absence of her parents.
Also good Komi, Chadano must be proud.
@The_Look_Of_Disapproval There's no proof this kid is particularly smart. She has to have the basics down to live by herself, which is what she's used to do by now, or at least to be able to properly communicate with her hosts
I always feel so proud when Komi reaches out to other people struggling to communicate. She might not know how to run and can barely walk, but she's already trying to help people stand.