Ris is a troll, for sure, but she doesn't generally go out of her way to hurt people. Just to tease and be a bit snarky if the mood is right. And as for the powers - she definitely doesn't want to hurt anyone with them! She's been practicing to make sure she doesn't. It's just that sometimes, things get a bit frosty without her meaning to.

As for the clothes: At least as far as coats and sweaters go, Ris tends to get things that hang pretty loose and long on her so that still might be possible!