The character known as Chauffeur, also referred to by the affectionate nicknames Jiya or Jiiya, serves as the dedicated driver and a key household staff member for the affluent Ono family. His primary role is to transport the young heiress Akira Ono, most notably to and from school, in the family's distinctive limousine. While his official title is driver, his duties and demeanor extend far beyond that of a typical employee, positioning him as a long-time caretaker who has looked after Akira since her childhood.

Chauffeur is depicted as a man of quiet loyalty and gentle demeanor, often acting with discreet benevolence toward the young lady in his charge. He presents a calm and trustworthy appearance, always dressed neatly and elegantly, but this professional exterior conceals a more relaxed personal side. Notably, he is open about his addiction to pachinko, a passion he prioritizes alongside his professional responsibilities, and he exhibits a subtle sense of humor and occasional nonchalance, especially when choosing to indulge his own hobbies.

His primary motivation is the well-being and happiness of Akira Ono, whom he protects with a quiet but fierce dedication. Chauffeur is acutely aware of the restrictive and pressured environment in which Akira is being raised and acts as one of her few silent allies within the household. He demonstrates this by deliberately helping her circumvent the strict rules of her tutor, such as hiding portable gaming consoles in the limousine's glove compartment so that she can play despite explicit prohibitions. His actions consistently reflect a deep understanding of her personal needs and a preference for her happiness over rigid adherence to protocol.

In the story, Chauffeur primarily facilitates Akira's movements and interactions, serving as a constant, steady presence during transit sequences. He provides her with essential emotional support and companionship in an otherwise isolating existence. His role also provides a source of light comedic relief through his driving, which is frequently and accidentally involved in collisions with Haruo Yaguchi, the male protagonist. These recurring incidents become a running visual gag, highlighting a somewhat dangerous driving style despite his best intentions.

His key relationships are central to his function in the narrative. The bond with Akira is one of profound trust, with him acting as a guardian-like figure who has seen her grow up. Initially, he regards Haruo with distance or as a minor nuisance, largely due to the boy's chaotic impact on Akira's life and his own driving record. However, as he observes the positive effect Haruo has on Akira's emotional state, his perspective shifts. Chauffeur comes to recognize Haruo as a valuable and precious friend to Akira, eventually offering him a quiet, unspoken approval and acknowledging his importance in supporting her.

While Chauffeur does not undergo a dramatic personal transformation, his development is marked by this growing acceptance of Haruo and his role in Akira's life. He evolves from a neutral observer to a subtle facilitator of their relationship, encouraging their connection from the background. At one point, he is temporarily removed from his position as her primary driver but continues to support her from the shadows with the help of a colleague. His steadfast presence remains a constant for Akira, unaffected by the strict tutelage of figures like her supervisor, Moemi Goda.

His notable abilities extend beyond simply operating a motor vehicle. He is a skilled driver, albeit one whose record is humorously marred by collisions with Haruo, and he handles the many household and organizational duties expected of a senior staff member. Crucially, his sharp perceptiveness and deep emotional intelligence are his greatest assets, allowing him to see past Akira's silent exterior and provide the precise support and leniency she needs without needing her to ask for it.