Aang (from Avatar: The Last Airbender) is a good example of a hero. No matter what he is faced with he tries his best to always be doing the more morally correct thing. He always is trying to spare lives, even those who are bad.
Sabo...TT He was brave enough to leave on his own because he knew the life that was expected of him was not right. We all thought he died. Later on, his brother died and Luffy thought he was alone. But then Sabo reappeared, not dead at all. To see Luffy happy...made me happy too. Sabo you're the best. TT