"She'll have you to learn from, right?" Danny asks, because while he has no firsthand knowledge of how siblings are supposed to work, that's what he hears about big brothers. "So she'll have an advantage."

"Oh!" Danny smiles when Paul says he wasn't born of Earth, and says confidently, "Don't even worry about that, Paul. I don't expect you to understand my references just because of the different universes thing, and it's not like I haven't met -- or worked with -- aliens before. When I was a kid, I teamed up with a half demon girl for a while. Before she tried to kill me."

Danny has a very strange history, but sometimes he forgets about how strange it can sound to other people.