Raizou Shioka (Shiokara) is the oldest of the four commanders of the Roborobo Gang (known as the Rubberobo Gang in the dub), serving as the team's designated "muscle." In contrast to Sarami, he struggles to interact with children and firmly believes in the superiority of his elders.

Often called upon when brute force is required, Shiokara is capable in combat but little else, as he is widely regarded as extremely dim-witted—even by the already chaotic standards of the Roborobo Gang.