Akira Amatsume resides at the local Shinto shrine, where she dedicates much of her time to the duties of a miko (shrine maiden). These responsibilities include performing traditional rituals, assisting with seasonal festivals, and maintaining the spiritual integrity of the shrine. Her daily life is steeped in cultural tradition, reflecting her upbringing in a devout household.

It is strongly implied that Akira and Kazuha Migiwa share the same father, the result of an extramarital affair. This revelation fuels tension between Akira and Kazuha’s mother, who harbors resentment toward Akira and has persuaded her husband to officially disown her. In the presence of Kazuha’s mother, Akira tends to act with visible deference and restraint. Despite this estrangement, Kazuha’s father maintains a discreet watch over Akira and privately expresses pride in her, particularly during local festivals. Yahiro Ifukube, Akira’s guardian figure, once confides to Haruka that she struggles financially to support Akira, subtly indicating that Kazuha’s father may be providing quiet financial assistance.

At the end of Akira’s narrative arc, it is revealed that her and Kazuha’s mothers shared a hospital room at the time of their births. Akira’s mother passed away shortly after childbirth, and Kazuha’s mother, moved by the newborn’s plight, briefly cared for her. The pendant Akira believed belonged to her late mother is revealed to have originally belonged to Kazuha’s mother. After Akira tugged on it as an infant, she was allowed to keep it, ensuring she would have a tangible keepsake tied to her origin.

Akira Amatsume stands at 153 cm, making her one of the smaller heroines in the series only slightly taller than Sora Kasugano. She has short brown hair, typically styled with two hairpins on the front, and dark brown eyes. Akira is often described as having a youthful, childlike appearance that matches her cheerful and energetic personality. Her features, combined with her lively behavior, give her a natural charm that others often find endearing. She is considered both beautiful and exceptionally cute by those around her.

Kazuha Migiwa
Akira shares a close and complicated bond with Kazuha Migiwa. While the two girls appear to be good friends, their relationship is deeply affected by the implications of a shared paternity. Despite the underlying tension caused by Kazuha’s mother’s disapproval of Akira, the two maintain a warm connection, and Akira does her best to avoid causing conflict.

Haruka Kasugano
Akira and Haruka first met as children during a summer visit, when they played together and caught cicadas near the shrine. Although Haruka does not initially recall their past encounter, Akira recognizes him immediately upon their reunion. Their relationship is rekindled over the course of the story, especially in Akira’s route, where she reveals her hidden vulnerabilities to him.

Yahiro Ifukube
Yahiro serves as a guardian-like figure to Akira, watching over her in place of absent family members. Though not a relative, Yahiro is deeply protective of Akira and provides her with support and guidance. It is also implied that Yahiro helps manage Akira’s living expenses, possibly with assistance from Kazuha’s father.