Seiuchin

セイウチン

A large Irish walrus (seiuchi is the Japanese term for walrus). As a walrus Chojin, Wally is the friendlier and more easygoing member of the New Generation. He greatly admires Mantaro Muscle and, in many ways, resembles him; both are constantly hungry and frequently seen eating. Wally cares deeply for his family, who often attend his matches. He is the Number 2 student among the Hercules Factory First Years and possesses considerable heart and spirit, though his kind and gentle personality can result in weaknesses in the ring. Originally, he was assigned to defend Hokkaido, a region in Japan well-suited to Wally's environment. In the current story arc, Wally has grown weary of Mantaro's numerous thoughtless remarks regarding him and leaves the Seigi Chojin side to form the Hell Expansions with Neptuneman. Neptuneman awakens Wally's ferocious animal instinct, transforming him into a bloodthirsty beast. Since then, Wally has appeared as an enemy of Mantaro and the others.
In the Japanese version, Seiuchin refers to himself in the first person as Ora (オラ) instead of the more common Ore (オレ). He refers to Mantaro as Aniki (アニキ), a term of respect for (in this case) someone considered a brother.