Hitomi Iseki is a character from the anime Two Car, serving as one of the supporting rival competitors in the series. She is a student at Takachou Girls' Academy and hails from the Hyogo prefecture, where she participates in the school's sidecar club as the passenger. Her role in the story is firmly established as part of the ensemble of rival teams that the main protagonists encounter throughout the sidecar racing tournament.

In terms of personality, Hitomi is presented as a polite, sweet, and mature individual who often acts as a mood-setter within her group. This demeanor makes her a calming and stable presence, contrasting with the more volatile dynamics of other teams. Her most defining characteristic is her extraordinarily close bond with her driver and teammate, Mao Katakura. The relationship between Hitomi and Mao is depicted as deeply affectionate and committed, with the pair consistently shown wearing wedding rings. They appear together in nearly every episode, often in a cafe setting, reinforcing the impression of a steady and domestic partnership. Their dynamic is framed as a comedic routine, with Hitomi playing off Mao in a way that is described as "all-loving and all-knowing," though the narrative also suggests their perfect relationship may have hidden complexities.

Hitomi's motivations are intrinsically linked to her partnership with Mao. While other teams in Two Car compete to resolve personal conflicts, prove their superiority, or win the affections of a coach, Hitomi and Mao appear to be driven by their seamless synergy and mutual support. Their presence in the tournament serves as a foil to the main duo, demonstrating a relationship that is functional, harmonious, and free from the bickering that defines the lead characters. They are not rivals born of conflict but rather a unified front that highlights the struggles of other pairs.

Regarding her role in the overall narrative, Hitomi is not a protagonist. The story primarily follows Yuri Miyata and Megumi Meguro, with Hitomi and Mao being part of the supporting cast of rival teams. Alongside other pairs like the Shishido twins and the dominant-submissive duo, Hitomi and Maos relationship is one of the several case studies in partnership that the anime explores. They provide a recurring example of a balanced and loving team, contributing to the series overarching theme of analyzing how different personalities function together in high-stakes competition. Very little specific information is available regarding Hitomi Iseki's personal development over the course of the series, her individual backstory outside of her relationship with Mao, or her unique abilities as a passenger that distinguish her from other competitors in the field.