Teoro's wife. She often nags him for skipping out on work or not being serious during a crisis. Sopuku also acts as sort of a mother figure to Eruruu and Aruruu. During the rebelion, Sopuku and other women from the surrounding villages stay at the rebel's HQ or base camp and take care of laundry, cooking, and medical treatment for the troops.

After the rebellion, Sopuku and her husband return to Yamayura.

Sokuku and the rest of the villagers are killed in a sudden attack by Kuche-Keccha, just as Hakuoro's alliance meeting is taking place. Before she dies, Teoro promises her that he'll warn Hakuoro about the attack.