"You wouldn't," Sirius replies, watching as Kieren drags his fingers along the cave wall, smearing just a bit of dark blood there. "Not with the spell, I mean."

He knows that's not what Kieren means, though. It's the affliction itself threatening to steal Kieren's identity, his humanity. And there's nothing Sirius can do for that, at least not on his own. He'll find a way, he's sure of it. With Kell's help. And Newt's. There must be something.

"I'd like you not to lose that as well," he adds, his voice quieter, strangely self-conscious. "No one's-- I mean, I've had friends that care for me, but no one's cared like you do. Not certain anyone else ever could, honestly. You're a terribly patient person, Kieren Walker," he says, trying for a smile though it's weak. Trying too hard. "I'd really rather not be here without you."