Michi Akitsu is one of four young pilots entrusted by Dr. Godo to operate the combining robot Ginguiser, defending Earth from the Sazriani alien threat. She travels the globe with teammates Goro Shirogane, Torajiro Aranami, and Zanta Minami, performing in a traveling magic show where she acts as a stage presenter. This public role provides cover for her responsibilities as a mecha pilot, demanding a friendly stage demeanor that contrasts with her naturally critical and competitive private disposition.

She co-pilots the 50-meter-tall Gran Fighter, a component robot transforming into a truck and trailer. Michi possesses genuine magical abilities, specifically the "point barrier" technique, allowing her to synchronize with and control Ginguiser during combat. Her character design features a heart symbol (♥) as her playing card motif, seen in her pink uniform and the Gran Fighter's weaponry, including the heart-shaped "Heart Cutter" projectiles launched from the Arrow Wing support aircraft.

As the team's sole female member, Michi often exhibits a harsh or sullen attitude toward her fellow pilots, particularly leader Goro Shirogane, though underlying loyalty motivates her actions. The character emphasizes her dual identity, balancing her public entertainer persona with the demands of covert mecha piloting and her contributions to the collective defense against extraterrestrial threats.