Mitsuo Zaizen is a supporting character in the anime Hero Bank. He serves as the managing director of Gappori Company, an organization that appears to be involved in the hero battle business and the financial arrangements surrounding hero suits. He is physically short in stature and is distinguished by his swirly glasses, giving him a somewhat quirky appearance. His primary hero suit is called Game Console Beep Boop, which suggests a video game–themed design, although specific abilities of the suit are not detailed. In the story, Zaizen works alongside a colleague named Fukuta Kanemaru, and both are associated with the company that manages the debt incurred by the main character, Kaito Gōshō. Zaizen's role is largely that of a corporate figure tied to the economic aspects of the hero battle system, and he appears in a supporting capacity throughout the series. His personality is not extensively elaborated, but his position implies a focus on business and profit. There is no notable character development or arc described in available sources.