Ash Roller

, アッシュ・ローラー

Haruyuki's initial adversary in Accel World was an individual known as Kurokawa, who possessed a Duel Avatar resembling a biker gangster with a skull-like head. Aside from being part of his avatar, the chopper he rode also served as both a weapon and a mode of transportation for him during battles.

Spoilers:

He defeated Haruyuki cleanly in the first match but Haruyuki challenged him to a rematch in the same day after getting instructions from Kuroyukihime.He was beaten in the rematch after Haruyuki exploited the weakness of the motorcycles design which forced him to get off the motorcycle and resort to a fist fight.