[Bro, he totally would if she were here. As it is:]

Yeah, Toph! She's one of my best friends back home. She's my earthbending teacher and one of the best earthbenders in the world. Except she can't do all the stuff with glass that you can.

[But, hmm, since Toph isn't here....]

Have you talked to Peridot? She can do stuff with metal too, but I don't know how good she is.

[Vague 'stuff' because he's only seen her do it once or twice.]