It's as Kai said: a revolution is to change the way your opponent thinks, and through so much death and pain and tragedy, Burner, Kai, and everyone who fought with them are proof that no matter how many times you fail, that no matter how hopeless the world may seem, as long as you still have the will to keep standing, you can change the world. In Greymark, every person has their own story, their own reasons behind their actions, justified or not, and it is that strength that drives them to shape their futures with their own two hands, even if it seems that all is lost. Burning Effect is a love letter to each individual story, just as it is a story about revolution.
And Great...he was so tired and sad and *angry* — angry at the world, angry at the people who made him the way he was, angry at himself for failing to protect anyone. In his utter rage, all he really was doing was screaming for help in the only way he knew how. I'm glad he was finally able to let go and smile freely, after everything.