Shō Utsumi is a high school student and founding member of the Gridman Alliance alongside Yūta Hibiki and Rikka Takarada. He sports teal hair styled longer at the back, blue eyes, and transparent-framed glasses. His signature outfit consists of a blue shirt emblazoned with a slashed 8 insignia, a white overshirt, black pants, and blue-and-white sneakers. This design deliberately references Shattered Glass Sideswipe from Transformers, reinforced by his backpack strap bearing "Turbo"—a detail that earns him the nickname "Turbo-senpai." Standing 176 cm tall and weighing 78 kg, his physique is occasionally described as slightly "pudgy." Utsumi displays a laidback, optimistic personality, readily accepting Yūta’s amnesia and proposing they rebuild their friendship. A devoted tokusatsu fanatic—especially of the Ultra Series—he frequently cites genre tropes during kaiju attacks. His expertise proves strategically vital, such as identifying Ghoulghilas’s neck weak point in Gridman’s first battle. This knowledge sometimes manifests forcefully, like pressuring Yūta about Akane Shinjō or attempting to stop him from facing the kaiju Dévadadan alone. His character arc revolves around evolving engagement with the Gridman Alliance’s mission. Initial enthusiasm for kaiju battles turns to disillusionment upon learning of collateral damage and human casualties. This triggers an existential crisis, compounded by discovering Akane—whom he admires as "unapproachable"—created their world as an escape. He nearly disbands the Alliance after Gridman’s temporary defeat but recommits after reuniting with the team. Guilt over enjoying destruction resurfaces confronting Anti, a reformed kaiju; though tempted to retaliate for past killings, he restrains himself. Loyalty drives key actions: he mediates Alliance conflicts, apologizing to Rikka after arguing over confronting Akane during the school festival. He pleads with Gridman not to risk Yūta’s life against Alexis Kerib and later volunteers to be Gridman’s host to spare Yūta further pain. Unspoken affection for Akane subtly influences his perspective. Post-final battle, he remains in the Gridman Alliance, supporting Yūta’s recovery while reflecting on existence. His role briefly expands when the Neon Genesis Junior High Students grant him temporary abilities, such as perceiving distant kaiju after Samurai Calibur optimizes Gridman’s systems.