[He almost whispers 'Kitty' before he can stop himself. Whoever this is, whoever she would have become- she obviously doesn't want that name to be used.

So he stops himself in time, and just sighs. He'd actually missed her.]

I am very, very vulnerable to magic. Some people have suggested it's like an allergy. And yet I haven't been affected.

I'd say that's a hint it may not be magic related?