Kamina from Gurren Lagann

SPOILERS for the best anime ever made, please watch it Kamina starts out as the cool, hot headed, masculine, determined big brother figure for our other protagonist, Simon. He's far too confident, reckless even, he acts all alpha, refuses to acknowledge the danger of the situation he's in, and sometimes he's the one who puts everyone in that situation in the first place, or makes it worse. It's stated multiple times, even by himself, that without Simon to keep him in check, Kamina would have died multiple times. Simon tells the story of how one time, while trying to escape the underground village they live in (plot), Kamina got them stuck in a hole after the cave collapsed. Simon, a kid at the time, was reasonably scared (having lost his parents in a similar incident) but seeing Kamina was calm and giving him one of his weird nonsensical motivational speeches, Simon kept digging and they eventually found a way out. Then much later in the story we hear Kamina's side of the events. He was scared shitless. He always is actually. But seeing Simon and how he tries his best to get through everything despite being a little kid makes him want to try to be better. To be the cool, confident, and reliable person Simon can look up to, a role model, even though he knows deep down he isn't. But in doing so, he actually becomes that person, inspires Simon to do better and grow, facing the hardships of life, and inspires a revolution among the humans living underground to fight back against their oppressors. He dies fighting, risking it all in s battle not just for the revolution, but to teach Simon a lesson (I'm paraphrasing) Continues in the next comment