Our story starts 15 years before Canon starts in mha. This story is about a young girl named Rune Yukimura.
Runes Story begins on her 4th birthday and her parents gave her a journal as a gift and then they went to the doctors to find out what type of power she had, all was going well and Rune was excited to find out what her ability was. However her ability would become her worst nightmare. Rune had the ability to heal any damage with a drawback of running out of energy and needing to sleep and her own hidden space where she could grow the herbs needed make medicine from them as well as a safe home for to hide in. Runes quirk was called archiveic healer. Her parents were excited however on their way home their family got into a horrible car accident and both of Runes parents passed away.
The day after Rune was put in the Orphanage, she was treated kindly at first but soon the other kids began to bully her. The other children said that she was weak for not being able to save her parents that day, the other children avoided her. It was awful, however Rune was not too bothered by the other children as it gave her more time to read and study. The healing power needed knowledge and stamina in order to get stronger and so Rune was always seen reading in a quiet corner away from all the other children, late at night she would train her body to handle her healing power by raising her stamina. Rune didn't like to sleep due to the nightmares she would have where she would see her parents covered in blood and how her powers weren't enough to save them. The days passed and it had been a year, soon she was going to be turning six years old as her birthday was fast approaching.