"Trust me, I know all the turns and tricks for summoning him. I'm a blood drawing and a candle away from being able to pull his essence out of thin air." And it's something he prides himself on too. He adores Karkat, but he also takes great pride in winding him up to great pinnacles of rage and letting him go.

The fact that she's dozing off is pretty obvious just from the way she's breathing against him. He's pretty buzzed. Tired, but still alert and still eagerly protective. Too much-much to sleep at this point, so he just rests his chin on her head while avoiding the horns as best he can.

"You sleep. I still got braining to do. I'll give you a nudge if I feel myself drifting off." He won't, and she probably knows, but that's irrelevant.