THIS. THIS SCENE TELLS YOU EVERYTHING YOU NEED TO KNOW ABOUT MAKO. He comes home from working a physically taxing blue-collar job all day and, without permission, starts eating BOLIN’S favorite dumplings. Bolin is a growing boy who needs that food or he’ll starve, because if Mako doesn’t feed him and look after him, who will? But Mako just starts eating the food HIS OWN LITTLE BROTHER needs to survive, and he didn’t even ask if he could have some. Why did he wonder where Bolin was? Because Mako didn’t want Bolin to know he was going behind his back and stealing his food. How selfish can you get? Apparently he never learned any fucking MANNERS as a homeless orphan. No wonder there’s only three people in his life who really care about him.
He ate a dumpling relax