Born as the illegitimate child of a local wealthy farmer's mistress. After his biological father's death, his existence was discovered, and he was taken in by his older half-brother, Tamegoro, who dotes on him. Toshiro is very attached to Tamegoro. 10 years old. Male. Small and slender, standing about 140cm and weighing 33kg. He has large, adorable blue eyes. He wears a light emerald kimono decorated with sparse, pale yellow autumn maple leaves. He is a gentle, honest boy with no sharp edges. However, that side is reserved only for those he has opened his heart to. He rarely speaks to other relatives and spends most of his time talking to Tamegoro.

172cm, 60kg. Male. A man of kind character who warmly welcomed the young Toshiro—who had no place to go after their father died—into the main family as his true brother, despite the disapproval of the rest of the clan.

They hold extremely negative and cold views toward Tamegoro, believing that bringing a mistress's child into the household is nothing short of madness.