Wolfox

Kiryu Kyosuke... arguably one of, if not the best, characters to have come out of 5d's. without a doubt one of the best villains. Heck, he's the only character to have beaten Yusei on screen. (I know, "Yusei didn't lose, his D-wheel gave out before the attack connected.". well tell me this, had his D-wheel not went belly up durring that duel would Yusei have been able to do anything to stop the attack? The D-wheel saved his live, not the duel.)

But yeah, Kiryu. Easilly one of the best characters from 5d's and probably one of the best antagonists from the entire franchise.