“Erased” is a Japanese anime/manga series that revolves around Satoru Fujinuma, a struggling manga artist who possesses an ability he calls “Revival.” Whenever a tragedy is about to occur, Satoru is sent back in time a few minutes before the event to prevent it. However, when his mother is murdered, Satoru finds himself sent back 18 years to when he was still in elementary school, and he must use his ability to solve a series of child murders, including the death of a young girl named Kayo Hinazuki.
Kayo Hinazuki is a classmate of Satoru who is being abused at home by her mother and her mother’s boyfriend. Satoru, with the help of his friends, tries to prevent Kayo’s murder by keeping a watchful eye on her and finding out who the killer is. After a series of events, Satoru and his friends believe they have figured out who the killer is, and Satoru’s mother, who is a journalist, writes an article exposing the suspect. However, it is revealed that the killer is actually someone else entirely, and that person has been manipulating events to throw suspicion on the original suspect.
The person who killed Hinazuki was revealed to be her mother, Akemi Hinazuki. Akemi is shown to be abusive towards her daughter, and her boyfriend is also abusive towards Kayo. Akemi’s motive for killing Kayo was to rid herself of the burden of taking care of her daughter, as she wanted to focus on her own happiness with her boyfriend.
Akemi’s abusive behavior towards Kayo is shown throughout the series, and it is implied that she has been abusing her for a long time. Her boyfriend is also shown to be abusive towards Kayo, and he is the one who actually injures her before she is killed. Akemi, in a fit of anger and frustration, finishes the job and kills her daughter. It is revealed that Akemi has been emotionally unstable for a long time, and her actions towards Kayo are a result of her own mental health issues.
Satoru and his friends ultimately solve the mystery of Kayo’s murder, and Satoru is able to prevent her death by changing the course of events. He saves her from being injured by her mother’s boyfriend and helps her escape from her abusive household. Satoru’s actions not only save Kayo’s life, but they also help her to heal from her past trauma and live a better life.
In conclusion, the person who killed Hinazuki in “Erased” was her mother, Akemi Hinazuki. Akemi’s abusive behavior towards her daughter is shown throughout the series, and her mental health issues ultimately lead her to commit the murder. Satoru is able to prevent her death by changing the course of events and helps her to escape from her abusive household. Satoru’s actions not only save Kayo’s life but also help her to heal from her past trauma and live a better life.