[it means Chrollo has to tilt his head the slightest amount to keep looking Hisoka in the eye, but he doesn't move aside from that. Hisoka looming doesn't bother him at all.]

Maybe you wouldn't. But that doesn't mean that I'm able to promise the same. If you're so set on accompaniment, that is.

[that might be caring, trying to keep Hisoka out of danger. if Chrollo wasn't Chrollo. he knows Hisoka can handle himself, so what he says is just fact.]