The immediate deflection is more a tell than his voice, and Severus almost laughs. Gods and Merlin, what's he been through? This end doesn't quite match up with any of the threads he's chased over the years, but reality is, after all, infinite. (Just not when it comes to anyone being useful besides him, apparently.)

"No, stay." It's not harsh enough to be an order, even though he's not in shock anymore. This revelation gave him a turn, yes, but there's no hatred or bitterness seeping through here. For those two words he sounds a bit more northern than Sebastian would be used to - he's broken a lot of habits, but he's still in a place where he slips back into it here and there. He mutters something that might be ought to wave mine off too ... his what, His Lucius? Saints have mercy. He gets his CiD, anyway.

Hellsing, then. Of course.

"I suppose we're both lucky I'm not better at that." Now he's starting to sound annoyed. At least his reality isn't wholly alien.