Aya Kishida, niece of Ariel's creator Dr. Kishida, juggles intense college entrance exam preparation with piloting the giant robot. Her academic ambitions take clear priority, fueling initial reluctance to fully commit to her uncle's requests. She pragmatically bargains with Dr. Kishida, agreeing to operate Ariel only if he covers her tuition costs.

Physically, Aya's freckles and glasses underscore her studious nature. She serves alongside her cousins, Mia Kawai and Kazumi Kishida, as one of Ariel's three primary pilots, responding to alien threats. However, her focus on academic success makes her the most hesitant pilot, creating persistent tension between her desire for a normal educational path and the extraordinary demands of defending Earth.

While her role is integral to Ariel's function, Aya's personal struggle centers on balancing immediate academic pressures against urgent combat duties. The documented narrative maintains this tension as a central conflict without significant evolution in her character.