Kuina is a supporting male character with long blonde hair, brown eyes, and an appearance that often includes a braid, a robe, and a choker with one eye visible. Within the story, he functions as an informant for the Imperial Library Information Assets Management Bureau, known as Fukurou, supplying the group with knowledge about books and unfolding incidents. He maintains amicable relationships with the bureau’s members, and he directs a notably heightened attention toward Tsugumi Kuze, the young woman who joins the organization after her brother’s encounter with a cursed tome. Kuina is also accompanied by a pet named Perry. Further details regarding his background, underlying motivations, personal development, or specialized abilities remain unrecorded in the available material.