That or his hair. Zelos would have probably killed him in return if anything happened to his hair.

"He wouldn't have let us out otherwise." But that just makes it sound like he's trying to find an excuse for what he did...

He releases a short sigh, running a hand over his face. "If he wants revenge for what I did, that's fine." Sasuke had chosen to go for him out of the simple fact that Ema was still recovering from her own injuries - it wasn't fair to him in the slightest.