[@The1Rolling1Boy]: Right so um...

"Greek Mythological Texts" is waaay too broad. If you're going with Callisto, the Concept of "Nymph" would make more sense. Then you could work in some charm abilities, stuff like that. As for Callisto herself, her relation to Artemis means you could give her a bow in addition to the Strength-boosting bear stuff.

Maybe make bear mode a sort of "berserker" thing where it boosts her strength a whole bunch?