Older than some of them, even.

[He laughs a little, until it turns into a cough.]

Being a vampire explains a lot. Too bad, though. It’s rather disappointing not to be a ten year old super-genius. I’ve just had a lot of time to work at things.

[Suddenly he frowns.]

I’m not not a child, Romeo. I died seven centuries ago and became a vampire who killed hundreds of people over the years. Do you still want to be my friend, knowing that?