Rainbow is a male contestant on War for Object Acres. He is the main antagonist and a generally self-conscious lad, as he's always nervous of what people think of him.
Episode 1: A watery grave
Rainbow is first seen knocking Diamond off his ledge, as Cocoa scolds him for his behavior. Later, he is chosen last for teams by the gambling slot machine. During the challenge, Rainbow knocks object after object off the log, until Viking helmet scolding him for knocking down Princess hat. Rainbow then understands what VH is telling him, tries to cross the log, only to be knocked off by Cratey, Pancake, and Spikeball. He falls off the log, meaning his team must face elimination.