Hmm, well it didn't take a long time for someone to die on this mission. Unfortunately it had to be one of the coolest guys too. It is actually kind of impressive that Inaba keeps getting more pathetic. You would think at some point he couldn't get any worse. I'm actually starting to think that Inaba, himself, is the Katastrophe.
Kurono won't be very happy when he realizes Old Man is dead. Maybe he will end up killing Inaba for us, that would be pretty awesome.
I guess the question now is, who will be the next to die? Inaba is like immortal, so it probably won't be him. Nishi is invisible and smart, so he will be safe. Kato and Kurono are together, so they are in good shape. Kaze and the kid are probably together, plus Kaze is a beast, so I bet they stay alive for a while. I guess that just leaves Cherry and Reika. I am pretty sure they are both alone, which would make them the most vulnerable. I'm going to guess Reika. Like many people said after chapter 286, once your character goes crazy, your death is usually not far behind.