Nomo is a Public Safety Devil Hunter who appears as a minor character in the Bomb Girl arc, the storyline adapted in the film. He is a member of Division 2 and is introduced as an older, more experienced senior to Aki Hayakawa, having worked alongside him in the past. Nomo is energetic, easygoing, friendly, and supportive. He holds a deep respect for Aki's potential and expresses a wish to recruit Aki into his squad once he achieves his goal of becoming vice-captain within five years. Aki, in turn, looks up to Nomo as a dependable senior. Throughout the story, Nomo's primary motivation is his professional duty as a Devil Hunter and his genuine care for his colleagues, particularly Aki, whom he tries to protect.

In the story, Nomo first appears when Denji and Beam take refuge at a Division 2 training facility. He is present alongside other hunters when Reze attacks the facility. During the battle, Nomo survives a close-range explosion from Reze, losing an arm in the process. He demonstrates remarkable composure and fearlessness, quickly stopping the bleeding and continuing to fight. He even makes a darkly humorous remark to Reze about her appearance, showing his unshaken resolve in the face of a deadly hybrid. His combat ability is limited by his contract with the Fox Devil, from which he can only summon the Fox's leg rather than its full head, a limitation implied to be due to the Fox Devil's vanity regarding the appearance of its contractors. Despite this restriction, Nomo fights effectively and endures a level of damage that would kill most hunters. His key relationship is with Aki Hayakawa, whom he treats as a protégé and friend. He also briefly interacts with Denji and Beam during the facility siege.

Nomo's development is expressed through his final actions. Recognizing the hopelessness of the situation, he chooses to sacrifice himself to ensure that Denji and Aki can escape safely. His death occurs when Reze overwhelms the defenders, killing Nomo alongside the Division 2 Vice Captain and several other unnamed hunters. His sacrifice marks him as an unsung hero of the arc, a figure whose bravery and professionalism shine briefly before his end. In terms of notable abilities, Nomo has a contract with the Fox Devil, allowing him to summon a portion of the devil's body, specifically its leg, to attack. His true strengths lie in his durability, his ability to withstand extreme pain and injury, and his psychological resilience, as he shows no fear even when facing an overwhelmingly powerful devil like Reze. Nomo's brief appearance leaves a clear impression of a loyal, courageous, and capable hunter who gives his life for his comrades.