Akira Amatsume serves as a shrine maiden at a local Shinto shrine, residing there alone after the deaths of her foster grandfather and parents. Standing 153 cm tall with short brown hair, dark brown eyes, and a childlike appearance, she typically wears two hairpins. Her duties encompass performing ceremonies, maintaining shrine grounds, and upholding festival traditions. Renowned for her sewing skills, she frequently assists elderly villagers with errands. Outwardly cheerful, energetic, and innocent, Akira thrives in village life, displaying playfulness around children and athleticism honed through daily shrine tasks. Beneath this liveliness, she harbors profound loneliness and depression rooted in her orphaned status, fearing abandonment. This vulnerability surfaces primarily with Haruka Kasugano, whom she trusts with her struggles. She deliberately shields close friends like Kazuha Migiwa from her inner turmoil to avoid burdening them. Akira’s past involves significant complexity: orphaned as an infant, distant relatives refused to care for her, leaving her to be raised by her foster grandfather. Heavy implications suggest she is the illegitimate daughter of Kazuha Migiwa’s father, leading Kazuha’s mother to ostracize Akira as a reminder of her husband’s infidelity. Though disowned, Kazuha’s father discreetly supports Akira financially through her guardian, candy store owner Yahiro Ifukube. Akira passively endures Kazuha’s mother’s hostility to prevent conflict. Her pivotal story arc centers on a pendant she believes belonged to her deceased mother, lost years earlier during a fall with Haruka. After rediscovering it with him, Haruka learns from his grandmother’s medical journal that hospital tags were switched during Akira and Kazuha’s births, suggesting they were accidentally swapped. The journal also notes Kazuha’s mother’s pendant was broken by Akira as an infant. Confronted with this, Akira resists pursuing the truth to avoid shattering Kazuha’s family or causing Haruka pain, culminating in a breakdown where she suggests disappearing to end others’ suffering. Haruka, Yahiro, and Kazuha arrange a DNA test; Kazuha collects samples from herself and her mother, while Yahiro obtains Akira’s. Results confirm Kazuha’s mother gave birth to Akira. Kazuha’s mother later reveals she shared a hospital room with Akira’s biological mother, who died post-childbirth. She allowed baby Akira to keep the pendant after the infant grabbed it, ensuring she retained a memento. This revelation resolves Akira’s identity crisis and mends her ties to Kazuha’s family. Akira shares a sisterly bond with Kazuha, considering her a best friend despite family tensions. She develops romantic feelings for Haruka, confessing after their shared experiences, and their relationship deepens into mutual commitment through his support. She maintains friendships with classmates like Nao Yorihime and Sora Kasugano and is often seen caring for a cat.