Jīya, whose real name remains unknown, acts as butler and personal driver for the wealthy Ōno family, specifically dedicated to Ōno Akira. He presents as an elderly man with grey hair and a balding head. Having served the Ōno family for many years, he displays profound loyalty and affection towards Akira, readily bending or breaking strict household rules to support her.

His core duty involves chauffeuring Akira, and he actively indulges her passion for gaming by facilitating visits to local arcades. He exhibits protective instincts, notably stepping in to defend her against her strict tutor. This consistent rule-bending underscores his prioritization of Akira's happiness and well-being above protocol.

Alongside his devoted service to the Ōno household, Jīya personally enjoys playing pachinko. His consistent portrayal emphasizes his caring nature and unwavering commitment to supporting Akira in her pursuits.