They... find witches. To kill them, generally. As it's illegal to exist if you have the misfortune to be born one back home.

[But that's a word she knows for once.] You're half angel.

[There's a long pause between that statement and what comes next as Morgana tries to avoid well, doing anything like wondering out loud if maybe she really was going to hell since apparently she'd been chatting with someone who was part divine like she was any old person... After all, she was just Izzy. Wasn't she? Even if she was part angel? How did someone like that even get trapped here?! She swallowed and moved on.]

Depends what you're teaching him, sometimes he gets too shy even to touch...