While listening to Katherine, Zac folds his arms, then tilts his head side to side once she's finished, considering her words. He looks a bit amused, actually. "Now hold on - you go and tell us that this shouldn't be our fight despite our worlds being threatened, then kick yourself over inactivity that caused this?" His hands move to rest at his hips, and his expression grows a bit more determined.

"If anything, that's plenty of motivation to throw in. I dunno about everybody else, but having to say that kinda thing to the people at home isn't on the list of stuff I wanna do."