SpoilerIn Episode 3, it is revealed that she is brought up in a family where her father and mother keeps on having quarrels & fights against one another. It lead her to a fear that keeps everything to herself, which made her become a lonely person.
It was till one day she hears a band album that sang words meant what she had experience through her life. That was then she decided to sing out to express herself - She found an acoustic guitar that was thrown away, which she picked up and got it fixed and used it to perform. She decided to leave home and continue to pursue her dream as a performer while also holding part time jobs
In the same episode, she revealed that she died in the hospital due to a stroke in her head that paralyzed her body - It was during the fights between her parents when a beer bottle hit her head by accident.
After singing her ballad during the concert, she accepts her fate and vanishes, leaving only her acoustic guitar behind. It was then the gang realized that they don't have to really obey what Angel says in order to enter another life, which they do not want.