Hazuki Toreishi embodies the roles of mother, manager, and songwriter for the Toreishi sisters, guiding the idol-pilot unit Hummingbird with strategic precision. As the heiress to a business magnate’s legacy, she merges inherited corporate savvy with military oversight, negotiating contractual terms between the team and the Japanese Air Force as their commanding officer. While she defines mission parameters, operational execution falls to eldest daughter Kanna, tasked with enforcing compliance.

The sisters’ advanced aircraft, crafted under her father Bun Toreishi’s supervision, stand as testaments to her family’s technological heritage. Her husband Yuma’s disappearance during a flight mission years ago left her to raise their daughters alone—an event that quietly fuels their aspirations, particularly Satsuki’s admiration for her vanished father.

Balancing parenthood with leadership, Hazuki maintains a composed demeanor amid the sisters’ dual careers as idols and pilots. She collaborates with producer Shunsaku Kudou, who discovered the group mid-training, and oversees logistics with executive manager Shinobu Ijūin. Her methodical governance harmonizes military rigor with entertainment industry demands, ensuring the unit thrives in both spheres without compromising discipline or creativity.