Callisto needs healer training

So I had planned from the beginning for Callisto to be something like a reluctant healer. Like she enjoys learning about plants and herbs and their scents and uses, but only uses her knowledge to help others grudgingly.

But she's still very much inexperienced and in need of lots of training. I'm looking for a character who might be willing to teach her as much as they can about the herbs they know, both good and bad cause she is totally not against giving a particularly annoying patient an herb with a nasty side effect.

Would any characters be game for teaching this stoic little girl? c: