I rolled this one around in my head for a while and I think the summary of Warren's arc is Refusal.
A lot of Warren's choices and actions are a direct result of something happening that he doesn't want to happen. He learned to fight because someone got hurt. He stands on a rock because no one else was doing it. For all of his achievements he doesn't think he stands apart from anyone else, and often agrees to disagree when people try to tell him otherwise. Warren doesn't do a great job of accepting the world as it is.
A lot of Warren's choices and actions are a direct result of something happening that he doesn't want to happen. He learned to fight because someone got hurt. He stands on a rock because no one else was doing it. For all of his achievements he doesn't think he stands apart from anyone else, and often agrees to disagree when people try to tell him otherwise. Warren doesn't do a great job of accepting the world as it is.