The hunger. Louis speaks about it like it's some entity of its own, and Konstantin wonders just how much control over it the other man actually has.

There's a blink of surprise at the words, and then a soft, dark chuckle.

"That's certainly a dead-on description of the thing." A solitary creature who needs the body of someone to survive. The fact Louis is something similar is.. a strange pill to swallow. Konstantin's encountered many unusual people in this place, but none like him. None who... burned and screamed in the sunlight.

"...And it doesn't like the light. I'm guessing neither do you."

Sorry Louis, you really do have a lot in common with an alien tapeworm... It's basically a little vampire of a beast. Blood-sucking, light-adverse, suited for dark, empty places.