Kei Fujitani is an official pilot and instructor at the Shimoji airbase, holding the critical position of Meteor Sweeper within the global defense system. His duty involves intercepting comet fragments that bypass primary space-based defenses, typically serving as navigator alongside fellow pilot Kazuma Iwasaki aboard high-altitude interception aircraft.

Physically, he possesses red hair and gray eyes, and is frequently shown wearing glasses. His personality reveals a sharp contrast: during vital combat operations, he exhibits responsible and adult behavior, prioritizing mission success and safety. However, outside of combat, he engages in persistent and unwelcome advances toward multiple female personnel at the base. He particularly targets Ran Mikuriya, a waitress at the Kouchin Restaurant, while extending his intrusive and harassing behavior to other women, actions that consistently result in rejection.

Despite these personal shortcomings, he unintentionally becomes a role model for younger candidate pilot Tsubasa Miyazawa, who adopts similar behavioral patterns toward female colleagues, indicating his influence extends beyond formal flight instruction.