Kiuru, Prince of Ennakamuy, sports light blond hair, striking cyan eyes, and distinctive animal-like brown ears and tail with darker tips. His notably smaller stature compared to other males invites teasing and fuels personal insecurities. Personality-wise, he embodies gentleness and kindness, yet flusters easily, especially around Oshtor's younger sister, Nekone, for whom he carries an unrequited crush. While his companions recognize his feelings, Nekone finds his persistent attention bothersome. Despite his royal title, Kiuru often worries excessively about others' well-being. He shares a deep bond as the sworn brother of Oshtor, whom he deeply respects, even admiring Oshtor's formal persona. After Oshtor's death, Kiuru aids Haku (impersonating Oshtor) with odd jobs in Yamato's turmoil, believing them to be Oshtor's orders. His loyalty remains steadfast until the shocking revelation of Ukon's dual identity as Oshtor. A pivotal romantic misunderstanding defines his development: attempting to confess to Nekone with closed eyes, he unknowingly declares his feelings to Shinonon instead. Shinonon, harboring her own affection, accepts. Their engagement, arranged by her guardian Jachdwalt, complicates Kiuru's life as he grapples with lingering feelings for Nekone. A decade post-Mask of Truth, Kiuru matures into the calm and collected Owlo of Ennakamuy. He has moved past his crush on Nekone, remaining composed even around her daughter, Ketocy. During this time, he and Shinonon adopt Kemoruru, a childlike Assimilant Weapon discovered in Yamato, with Kiuru serving as her adoptive father. In combat, Kiuru wields a bow with competent skill, demonstrating a slight visual acuity favoring his right eye that influences his archery technique.