Multicolored Rainbow

Wide eyes and full lips define his face, and he ties his hair up in a tall braid that stands atop his head. Over a black bodysuit he wears a vest cut with diagonal stripes.

He shares the self-assurance common to the Heavenly Ninja Party, readily joining forces with other Ninja Village graduates to better their odds of killing Flash. His hatred of Flash stems from the destruction of the Ninja Village, and for all the misery he endured there, he still upholds its code.

Rainbow trained alongside Firmament Sky in the Ninja Village's fifth graduating class, remembered as Potential. In the Ninjas Arc, the Heavenly Ninja Party corners Speed-o'-Sound Sonic at his hideout to lay out its members and its scheme for world conquest, along with plans to kill both Flash and Blast under the direction of the figure they call That Man, Empty Void. They order Sonic to lead Flash to them, then later break into the Sonic and Flash duel, incensed that he failed to. When Sonic strikes Shrieking Scream, the party turns on both fighters and brands Sonic a traitor.

Blast soon steps in, routs the party, and teleports everyone to Sonic's hideout, where Saitama has already beaten the Ninja Village leader. Rainbow and the others throw themselves at Saitama and are dropped one after another; they then watch Byakko and Genbu appear only to fall to Blast and Empty Void. Awed by Saitama's power, the group tries to take him on as their master, and when he declines, Rainbow resolves along with the rest to trail him. A trained Village ninja, he moves with speed far past a normal human, fights with a pair of dao swords, and in the webcomic hurls bo-shuriken; there, he even blocks a few of Flash's strikes before being cut down when Sonic's Ten Shadow Burial distracts him.