Akari is a good-looking young woman with medium build and long black hair. She always dreamed of a better life, feeling embarrassed by her rural home town and her hick family. Growing up, she thought about leaving her family to live in the urban side of Morioh.
Akari Hirai was a young girl who lived in Morioh when it was still a rural town. However, she wasn't interested in Morioh's history and wanted to leave as soon as she could, fearing she would live her entire life in a farm. She left Morioh in search of a job, but went back after not succeding in her objective. To her surprise, Morioh developed quite well in the meantime. Later, she took a job at a home-sales office as an office clerk, and moved to a one-room apartment near the station. Akari eventually fell in love with a young architect named Teruhiko Okami.
Akari Hirai was a woman who held a kind relationship with Teruhiko Okami. She suddenly received a dial from Hanae Orikasa, and was warned by her about Teruhiko's secret of selling defective houses and found the money he made from it. Akari confronted Teruhiko about his secret on their company's roof, but was strangled by him and pushed from the roof. Though miraculously alive, she fell in the gap between two buildings and was trapped there by Teruhiko's Memory of Jet. Teruhiko tried to poison her, but after Akari revealed she was the only one who knew where she put his money, he was forced to keep her alive, but warned her that, should she call for help, he would kill her parents. Teruhiko constantly tried to convince her to reveal him the location of the money and so he would set her free, but she thought he would kill her instead. Later, Akari was astonished to find out that she was pregnant with his child. Though considered performing abortion herself out of her resentment of Teruhiko, Akari eventually decided to keep his life. Akari gave birth to him in the gap after living there for months, and made a deal with Teruhiko that she would tell him the location only if he kept her child alive. After seeing the evidence of the child being put in a temple and picked up by the orphenage, Akari revealed the money was actually always next to her. Unfortunately, even after Teruhiko picked up the money, he didn't set Akari free and never showed up again. Soon after, Akari died of weakness.