Oshutoru (オシュトル) is the Royal General of the Right who wears a disguise as Ukon to conceal his true identity. He excels in both literary and military arts, and is greatly trusted by people.
Oshutoru is a man with a strong sense of justice. According to Nekone, he doesn't trust people easily but immediately took a liking to Haku and Kuon, seeing their talent. He is firmly loyal to Yamato, willing to be executed even if he is innocent of assassinating the princess.
Oshutoru came from a low-ranked family that was noble only in name. Wanting to become a soldier like his father, he left his hometown and became a rank-and-file guard. He intended to return home after advancing the ranks, but instead was promoted to the Royal General of the Right after his deeds caught the emperor's attention.
Haku - Ukon befriends Haku after seeing him fix a water wheel. He comes to grow fond of the boy and guide him like a big brother. He enjoys hanging around Haku teasing him on a lot of things. He trusts him enough to get the job done to the point where even as he dies, passes his mask to Haku to take over as general and protect Anju during Yamato's civil war.
Nekone - His younger sister whom he cares for very much. He loves teasing her, even when she demonstrates a bossy attitude.
Mikazuchi - Rival and also fellow general. They always compete with each other yet are greatly trusted by the people.
Vurai - One of the Eight Pillar Generals, Oshutoru's strength seems to rival that of Vurai. They both respected and admired their strengths and were very similar until Vurai attempted to become emperor of Yamato, resulting in the two fighting in their Akuruturuka.
- His disguise name, "Ukon", was taken from the first part of The Royal General of the Right (右近衛大将 Ukonoe Taishou)
- While it is indicated in the anime that he does not tend to trust people easily, he comes to befriend Haku almost immediately after meeting him