Iori Monaka relocates to a new city at the series' start as the owner and caretaker of the catgirl Taruto, accompanied by his niece Kinako Monaka. He possesses a gentle and easy-going nature. While deeply affectionate towards Taruto, he perceives her speech only as ordinary meowing, creating a language barrier that frustrates her despite his attentive care. His dedicated hobby involves crafting various sweets and foods, showcasing significant culinary skill. A vanilla extract bottle, gifted by his cooking teacher, serves as his treasured good luck charm, symbolizing his passion. This charm is temporarily stolen but eventually returned. Iori harbors a one-sided romantic interest in Anzuko Domyoji, a neighbor obsessed with collecting cats. He actively tries to impress her, though she shows no reciprocal feelings. This pursuit sometimes causes him to overlook Kinako, contributing to her loneliness while living under his guardianship. The specific reason for Kinako residing with him remains unspecified. References to his wider family exist without explicit detail. His mother visits during a reconciliation with Kinako. He also mentions a sister while speaking to his mother about awaiting her return home. Kinako's parents, presumed to be this sister and brother-in-law, are consistently referenced as absent or off-screen figures during household conversations. No significant character development occurs; his primary roles remain providing a home for Taruto and Kinako, pursuing Anzuko, and practicing his confectionery hobby.