He's an awesome guy who helps all the new members, he's also a frightening ninja who bans all the bad guys. He isn't a Bungie employee however, he's a member like you and I (as are all ninjas). Ninjas are just voluteers that step up and take the burden of responsiblity of banning rule breakers and jerks. To become a ninja, you have to be invited. But, no one really know how that process works. Some say it starts with a dark interagation room and a wet noodle...where your will is broken and strength is gained.