Well... there's Rosethorn, but her's is like herbal stuff. Yukio, of course! Duke knows how to heal, and I'm pretty sure the Ryu's do, too. Ippo is pretty good with injuries since he's a boxer. Oh, I bet Ryuuji probably remembers a lot from the demon pharmaceuticals class. He could probably work with Rosethorn and maybe even Tris. Seimei-san, too!

... that's a lot, right?