[He's not at all surprised that the kid who doesn't know about books doesn't know what researching is.]

That's when you study things so you know more about them.

They became evil spirits. I'm not scared. [All right, he is. But he wouldn't admit it.]

I know how to have fun. [He hasn't had any real fun lately, but he does know how. He used to have lots of fun.] You don't need to have fun to fight evil. They're not related.

I've been exploring. It's part of my research. [Nonetheless, he has been studying for a while, and he could use a break, so he doesn't resist, letting Diarmuid take his hand.] I know a lot about this place already.

[He'd done his best to learn the lay of the land, like Natalia would have.]