Klaus is particularly attuned to the presence of another person in the room with him; hard not to be when he spent so many years trying to escape that extra presence. So when Max comes in, he can feel it, but he doesn't look up, not even when she comes to look over his shoulder at what he's drawing. He doesn't mind, it's not like it's some secret. He's surprised it even came out as well as it did, he hadn't sketched in years.

"Hm?" He does finally look up when she speaks, trying to let his ears and his brain catch up to each other in that delayed way that happens sometimes when people interrupt a zone like that. "Oh- no, it's just... nonsense." He laughs a little. Truth is, taking a look at the whole now, he supposes Five was on his mind, but that eye isn't his brother's, either. Hmm...

"You can't sleep either, I take it?" He's had an unsettling feeling gnawing at his insides tonight, which is probably why he hasn't been able to get to sleep. He doesn't know where all the anxiety is coming from, but he doesn't like it. Especially not in a place like this.