[He looks over his shoulder from where he stands when he hears Kaiba come in. He had been rather quiet, keeping to himself after that terrible display of an execution; keeping attentions at bay, playing the part of the properly traumatized young man, having to take the life of a woman who he knew was innocent. Even with Kaiba's accusations, the mask doesn't slip, not immediately. His body language remains the same, his stance unmoving.]

A vested interest? We all have a vested interest in staying alive, Kaiba.

[He says it, as if to point out that he's not the only one here whose motivations run on this notion of survival.

Light turns to face him properly, frowning. A moment passes as he considers how to respond to the rest of this.]

You think I'm in the mood to entertain this conversation right now?

[He's played at being the nice guy for too long, he won't let the act slip just like that. He's testing his reaction first.]