Mayumi works at Iruma Air Base in Saitama Prefecture as a dragon pilot. She is big, slow, powerful and always smiling calmly. When she was working at a zoo, an employee of Iruma Air Base witnessed that all savage animals were attached to her and scouted her for a dragon pilot. Mayumi understands dragons and tells their feeling to other pilots. She pilots a dragon which mimics C-1, the transport aircraft.