He usually is on the network, if not talking about giving music lessons, then he's at events, playing.

[He's very good at music, and it's lovely to listen to. She might have to ask Elliot if he'd play just for fun.]

He's friends with Eren, if that helps. I don't know if he's an expert on anything, but it wouldn't be a terrible idea to ask him anything. He's a good person, and a tolerant one.

He may know more then I would expect.