Where do I even start?

Okay, Hiyoko isn't exactly stupid, but she doesn't think things through. Ever. She just does stuff. Oddly though, she has a really impressive vocabulary.

Senri probably comes off as stupid, but it's more a combination of being uneducated and carrying a lot of emotional trauma. And the spirit of an angry man eating bear in his head. That can't be helping things.

Cardia is actually very smart. She's had kind of a slapdash, spotty education, so there's a lot of holes in her knowledge base. But she learns new things very quickly.

Elise is probably about average? She's childish, and doesn't like to work hard, but she's a pretty creative problem solver.