Mayumi Hitomi serves as a Dragon Pilot (D-Pilot) in the Japan Air Self-Defense Force, partnered with the dragon Futomomo. Transferred from Iruma Air Base in Saitama Prefecture to Gifu Air Base, she operates under the TAC name "Morris." Physically tall with a motherly, fluffy or pudgy build, Mayumi has dark brown hair and brown eyes. Her personality is characteristically cheerful, friendly, and nurturing. She frequently shares sweets with others on base, including Futomomo, and displays a strong affinity for animals. This affinity originates from her previous job at a zoo, where she befriended every animal – an experience that led directly to her recruitment as a D-Pilot candidate. She prioritizes kindness towards dragons, insisting they are not mere tools or weapons. Beneath her generally amiable exterior, Mayumi harbors insecurities about her self-image and struggles with her temper. During a survival training campfire conversation, she revealed a tendency toward self-dislike. She consciously suppresses her anger, aware that her physical stature can appear intimidating when provoked. This controlled fury manifests as Tranquil Fury, sometimes resulting in her unintentionally breaking objects she handles. Her Berserk Button is anyone disrespecting or mistreating dragons, as she views them as living beings deserving of empathy. Her bond with Futomomo is central to her role. She demonstrates deep protectiveness toward her dragon and objects to cold or utilitarian treatment of Organic Transformed Flyers (OTFs) by others. Within group dynamics, she advocates for mutual respect among pilots and their dragons, often mediating conflicts by emphasizing camaraderie.