Kaori is basically a guardian, trained to take the hit for her charges and get them out of there as healthy as possible. Is she needs to kill, she'll do it, if someone gets hurt, she'll go beserker. Magic-wise she has earth and very limited air, but don't rely on it too much aside from the occasional slab of earth to act as a barrier or ground shifting ground. As far as healing goes, she can numb pain and heal minor wounds, but don't rely on that either.

Essentially, her fighting style is like Sync's from Tales of the Abyss; up close and personal.