At the age of seven, he was able to save his family from the legendary guild of Machine Assassins, sent to wipe his family off the face of the Earth. As he did this, he unlocked his families' most powerful secret, "Machine Eye".
A pet peeve of mine is when playing a character in the roleplay I am also.GMing, people automatically follow my character as the leader, despite a lack of leadership qualities. for instance, in ny bleach rp of days past, my character had little to no leadership traits and was still made into the de facto leader of our mission.
Lots of similar RPs tend to pop up around the same time. I wouldn't really mind it, honestly, if someone say made a Bleach RP because they didn't like Rising Stars, and how it was set up. More power to them. I'll tell anyone, anytime, you don't like the way an RP is run, make your own.
That's why, Derpy, you don't continue with the fight unless they change it. I do(used to) a lot of Arena stuff. And for the most part that doesn't fly.
Well, chances are you can just outright reject him. You can outright reject anyone.
I would tell him you don't think he's cut out for the roleplay and explain why, in a decent way. The worst he'll do is get upset, but eventually get over it.