Inamoto first encountered Koyomi Yamanaka in middle school, witnessing her shatter a building window with a brick. She developed a crush on him during this time. A significant unresolved incident occurred when she presented Koyomi with a bag full of money and proposed they elope together. His flight from that situation haunted him into adulthood.

As an adult, she runs a grocery store and employs Yomogi Asanaka as her assistant. She is openly engaged to a fiancé. Physically, she stands 176 cm tall, weighs 58 kg, and has brown hair often dyed gold. While working, she typically wears a white shirt, teal pants, and a dark green apron bearing an identity tag. Her documented hobbies include domestic travel.

Within the series' events, she frequently teases Yomogi about his romantic life, especially when he starts spending time with someone. She unexpectedly reunites with Koyomi on the street, leading to an exchange of contact information. Following this, she invites him out for meals on multiple occasions. These encounters deepen Koyomi's ongoing unease as he confronts past actions and regrets. As a supervisor, she is generally accommodating toward Yomogi, though she demonstrates a noticeable preference for younger men through her lingering attention toward him. Given her stated engagement, these inclinations appear platonic.