[His eyebrows arch upwards at the revelation, shocked (at the sheer idiocy of this plan) for all of a second of two. But then he's seeing red again, and there's a snarl coming through his gritted teeth; if Rei is truly that eager to sacrifice himself, maybe a different beast would take him first.]

Idiot!

[Both hands now on Rei's collar, he slams the other boy against the wall, brooms knocked over from the impact. He has a temper, he knows, and this is maybe going well beyond his usual allowance, but he's just too damn mad-- at himself for having spoken too much in a time of anger, at Rei for refusing to come to his senses and realize there's no solid connection between his actions and the dangers they're facing, and above all, at this school for continuously pitting them against each other, for making them forget hard-learned lessons from the past.

For making them think even for a minute that their friends would just give up on them like that.]

Idiot! Nevermind how stupid that idea is, so what if it did work?! So what if it did keep everyone safe?! Do you really think I'd just sit by and let you sacrifice yourself like that?!