Dr. Kishida, a scientist affiliated with SCEBAI, designed the giant feminine-shaped humanoid robot Ariel, equipping it with body armor for combat. His goal: defending Earth from ongoing alien invasions, though these threats face operational challenges including budgetary constraints affecting their effectiveness. To operate Ariel, he recruits three young female pilots from his family: niece Aya Kawaii and granddaughters Mia Kishida and Kazumi Kishida.

Convincing them proves difficult due to conflicting personal priorities. College student Aya agrees only after negotiation secures her grandfather's financial support for tuition. High school student Mia, focused on academic exams and future independent college life, shows reluctance. Junior high student Kazumi displays more enthusiasm, aiming to please her grandfather while maintaining commitments like tennis activities.

Dr. Kishida's characterization aligns with archetypal "mad scientist" traits, driven by technological creation and persuasion to achieve his defensive goals. His pragmatic interactions leverage familial relationships to secure pilots despite their initial disinterest. The narrative focuses on his professional role deploying Ariel against alien threats within the OVAs "Ariel Visual" (1989) and "Ariel Deluxe" (1991), without exploring his origins, personal history, or significant character evolution. His involvement remains centered on this purpose, with no additional backstory provided.