Akemi Abikura is the older sister of Akihito Abikura, one of the main students in the story. She is an adult woman with a caring and protective nature, particularly when it comes to her younger brother. Physically, she is characterized by brown, shoulder-length hair and red eyes. Her appearance often includes a dress and a distinctive halo braid hairstyle.

Professionally, Akemi works as a nurse, a role that complements her innate desire to look after others. Her personality is marked by a strong, doting instinct, and she is constantly trying to pamper and spoil Akihito, much to his occasional exasperation. Her protective and nurturing behavior extends beyond just her family, as she shows an inclination to dote on new people who enter her brother's circle, quickly finding new targets for her affection.

Within the narrative, Akemi serves as a supporting character. Her primary role is defined by her relationship with her brother, whose life and secrets become intertwined with his homeroom teacher, Hiyori Hiwamura. As the series progresses, her overbearing but well-intentioned care provides a source of both humor and warmth, highlighting her as a key figure in Akihito's personal life. While her development is closely tied to her role as a loving sibling, her profession as a nurse suggests a capacity for competence and calm in professional settings, contrasting with her more emotionally expressive family life. Given the anime's recent release, further details about her background and personal motivations remain to be explored in the story.