I like the armor you get for defeating him, but after I completed the mission for him I felt so bad for him and I felt even worse that he basically was trying to commit suicide by standing there motionless in the arena. I felt so bad for killing him... I definitely tried to get out of the arena and tried to stay away. Most of the time now, I don't kill him; I play all the way up until I'm champion, and then stop, so he can stay alive. I also try to avoid doing that mission because I can't bear to see him sad.