You have to move forward. Everyone had known that this would be Kamina's philosophy on the matter. There was no question. He'd want them to go on. Hearing him say so, in the flesh, plain and clear, makes all the hours of pain and doubt seem just a little more justified.

"Nia is Lordgenome's daughter. The Beastman princess, so to speak." She debates pausing for effect here, but decides to continue before Kamina charges straight into camp to murder this girl. "But she was cast out, apparently, and now she's part of Team Gurren... she has a different way of seeing the world. And I think she helped Simon see it differently, too." Now she does pause, contemplating those two for a moment. "That's part of it, at least, what pulled him out of that slump. I think another part is that he's got someone to protect now. And someone who'll believe in him no matter what--with total blind faith."