"That's a surprisingly difficult question, actually."

Apollo pulls a long-suffering expression but there's amusement there, deep behind the weary look.

"Technically? Nine. But she's the reincarnated spirit of the twenty-first century..." He pauses, knowing Alex's thoughts on these things. "...So she's aged herself up a few times. I think she's supposed to be about eighteen or so now."

Apollo sighs, giving him a 'what-are-you-gonna-do' look, and adds:

"Kids, eh?"