Anybody who wants to study, though there's talent like anything else. There are some things you need to be a human to do. Human meaning, not artificial, like one of us.

[Since he's pretty sure half the people on the barge who insist they aren't human are just humans with minor variations.]

I know plenty that no human alchemist would have time or access to in a lifetime, and I also never sat down and learned all the basics like a beginner.