Momochi holds a high-ranking leadership position in the Iga ninja clan during Japan's Warring States period of 1580. Operating from a concealed command center, he utilizes advanced technology including computers that display real-time territorial conquests by Oda Nobunaga's forces. He identifies and analyzes anachronistic weaponry—such as machine guns and stealth bombers—within Nobunaga's army, recognizing these technologies threaten the established historical timeline. Momochi explicitly states Nobunaga possesses era-inappropriate items and acknowledges the resulting alteration of historical events. In response to these temporal disruptions, he initiates contact with the "time control department" for guidance. Momochi receives alerts about significant developments, including Shishimaru's survival after battle, highlighting his role in intelligence gathering and coordination. During clan strategy meetings focused on Nobunaga and Ginnai Doma, he defends Shishimaru against criticism from fellow ninja leaders, demonstrating a protective stance toward the younger ninja.