Never mind the other definition. Balmung is a character from the whole .hack series. Known as "Balmung of the Azure Sky", he begins as a legendary player in .hack//SIGN, then gradutates to a .hacker, or ultimate hero, in the .hack games. And finally, in .hack//LEGEND OF THE TWILIGHT BRACELET, he becomes a manager for The World. Balmung is oh-so-prettiful. ^^
"I became an administrator to protect this World which I love..." Balmung explains when asked why he started playing The World.