Per...sona?

[He had noticed a few big...well, maybe not people but figures fighting the monsters during the attack. Ones who weren't around anymore.]

So its like a thing that does magic for you?

[Not anything he was familiar with, but his knowledge of magic was very, very limited.]

I can't really do any--uh, no, I guess I can do a little magic. I'm not very good at it.

[He can't do it anymore, but since it didn't occur to him to try during the battle he doesn't know that yet.]