Well, making golems for one but from what I gathered her grandma likes working on a lot of crafty projects. Jewelry, ceramics and the like...

I've only met her a few times though so I haven't seen much of her or the things that she makes.

[Monts certainly didn't dislike Berna but she wasn't entirely comfortable around the powerful witch.]

She's similar to Iona but... Not. Hard to explain unless you meet her yourself.