I tend to see in a lot of movies and animes, probably no earlier than the second or third story arc (or in Battle Angel Alita's case, probably the fifth page or something) the main hero gets asked by a very equal-and-opposite counterpart "Why do you fight?" as a character development question. The answer probably isn't "because my fight against the bad guy is what is pulling the story forward", but rather "I fight for pride and honor" or "I fight so no one else has to" or "I fight because it's fun", or something like that which really spells out a description of the character. So, what about you? Rather than stopping by everyone's Q&A to ask the question so many times, I'll do it here. If you were a fighting hero of some kind, on the level of anime or video game or comic book heroes (and side-character heroes), and you were asked why you fight, what would be your stated reason? I'll start with myself. If I was a hero in one of those media, I think my motivation would be selfishly "I fight for myself, to know that I can". Sure, I would also have friends and my city in mind, but the reason I would fight is to get stronger, so I can know that I am enough to protect those people without having to count on anyone else. Not to leave them to be protected by the other characters, but for myself to be enough, confirming and re-confirming that I am becoming strong enough to do whatever I decide needs to be done.