Koharu Sakurai is an adult woman with green eyes and neck-length brown hair, presenting a typical office worker appearance devoid of distinctive accessories or exaggerated features. She holds a standard corporate role as a company employee, though her specific job responsibilities remain undefined.

Cheerful and hardworking, Koharu possesses a dedicated passion for well-crafted cocktails. This interest directly links to her marriage with Shinya Sakurai, a bartender who regularly creates drinks for her. Their relationship reveals Koharu's exclusive display of a soft, sweet side toward her husband, contrasting her professional demeanor, while her admiration for his mixology skills forms a key aspect of their marital dynamic.

Her narrative centers primarily on interactions within her marriage and potential exchanges with colleagues.