6x6 - Dragon Ball Z: Dragon Box

The first match of the adult division is between Kuririn and Punter. The spectators are confident that the gigantic Punter would win, but with one relaxed blow, Kuririn claims victory. In the following match, Piccolo's opponent is the mysterious man Shin. Sensing his true identity in a way that only someonewho had merged with Kami could realize, he voluntarily steps down from the fight before it even starts. Who is this Shin, exactly?