Jiiya fulfills dual roles as butler and chauffeur for the Ōno family, dedicating his service specifically to managing Akira Ōno's daily routines and transport. His long-term employment underscores unwavering loyalty to the household. Responsibilities include driving Akira to school and various destinations, discreetly enabling her arcade visits despite strict family prohibitions.

Kind-hearted and deeply caring toward Akira, Jiiya consistently prioritizes her well-being over rigid rules. He smuggles portable game consoles in his car's glove compartment and openly challenges authority figures like Akira's tutor to protect her from punitive measures. This demonstrates both his protective instincts and willingness to subvert restrictions for her sake.

A profound bond of trust defines Jiiya's relationship with Akira. He intuitively interprets her unspoken emotions and advocates for her during household conflicts. By persistently supporting her gaming interests against familial pressures, he becomes an essential pillar of her personal joy and respite.