Dr. Kishida designs and builds the giant humanoid robot Ariel to defend Earth from alien invaders. He recruits his granddaughters, Aya and Kazumi Kishida, and his niece, Mia Kawai, as Ariel's pilots. Securing their cooperation proves difficult: Aya prioritizes college entrance exams, Kazumi is dedicated to her tennis career, and Mia demands payment of her tuition fees in exchange for piloting.

He is affiliated with the organization SCEBAI. Dr. Kishida's defining trait is his unwavering determination to deploy Ariel against extraterrestrial threats, frequently relying on negotiation or persuasion to overcome his granddaughters' and niece's resistance during attacks.

The invading aliens Ariel combats display bureaucratic inefficiencies and financial concerns, opposition Dr. Kishida indirectly provides through his defensive actions. His known history is limited to his relation to the pilots.