Aoi Akane is a first-year student at Kamome Academy who projects a popular, cheerful image masking deeper complexities. She possesses indigo hair and eyes, initially styling her hair in looped pigtails before wearing it down from Chapter 101 onward. She wears the standard school uniform, adopting distinct traditional attire with magenta flowers in her hair and a light teal coat while serving as a kannagi under No.6.
Her childhood was troubled by parental deceit and persistent peer bullying. Despite the targeting, she rarely showed outward distress, leading her to suppress emotions and meticulously craft a persona of perfection and approachability upon entering Kamome Academy. This facade earned her widespread admiration and the informal title of the school’s "queen of popularity," though internally she harbored resentment and loneliness, believing her true self would be rejected.
Relationships shape her development. She maintains a close friendship with Nene Yashiro, regularly sharing supernatural rumors despite claiming to dislike scary stories. Her dynamic with childhood friend Akane Aoi is fraught; she consistently rejects his daily confessions, humorously citing that marriage would render her name "Aoi Aoi." However, jealousy surfaces when he appears romantically involved with others, hinting at unacknowledged feelings. A turning point occurs in Chapter 69 when Akane confronts her artificiality, revealing he has always seen her genuine nature—including her condescension and self-loathing—and loves her regardless. This fractures her facade, culminating in tearful vulnerability and implicit mutual acknowledgment of their feelings.
Supernatural elements gradually entangle her life. Initially a conduit for rumors to Nene, she later gains the ability to perceive supernaturals like Hanako and No.6. Abducted by No.6 (Shinigami-sama), she agrees to become a kannagi, a role granting her control over insect swarms and a giant centipede, likely through powers bestowed by No.6, stemming from a desire to escape her oppressive reality. Sacrificed to extend Nene’s lifespan, she becomes trapped in the Far Shore, where her regret centers on never openly reciprocating Akane’s feelings.
Her character evolves significantly post-capture. Shedding her cheerful pretense, she exhibits quieter kindness, such as tending to Akane’s abdominal wound despite verbal dismissiveness. After Akane rescues her from the Far Shore in Chapter 85, she demonstrates greater emotional openness, tearfully wishing she had confessed her feelings earlier. In the "After-School Hanako-kun" spin-off, her interest in Kokkuri-san indirectly drives Akane’s comedic attempts to connect with her, reflecting their ongoing tension.
Additional traits include academic excellence (ranking first in exams), a concealed fear of lightning, and preferences for giraffes, winter nights, desserts, and solitary walks. Her name’s kanji (赤根葵) translates to "red root hollyhock."