[Not a very sad backstory but she's really lonely:( ]
Sora was raised by her rich family. Rich - sounds good for everyone since it means that they have a lot of money and can buy everything they want. But it wasn't a blessing for the little blonde girl. She already had to study three different languages at a very young age: English since she first used to live in America, Japanese because of her mother who came from Japan but also French just because her parents had connections from people at France and it was important for them that their daughter could speak that language as well. But even that wasn't enough. Instead of playing with children in kindergarten, she was only allowed to play with older people who were paid to be her 'friends'. The family wouldn't let their child be with other children since they could be a bad influence to her. When the girl was at the age of 9, she discovered her love to music and her parents supported her by giving her extra lessons where she could learn how to play different instruments. Of course, these lessons were boring for her but she had to go along with it and tried to think positive about it since there was no other way for her to live out her hobby.
Sora was even having private school lessons at home and never went to a public school. All of her grades had to be straight A's as well.
However, all of that private stuff made her isolated from the real world and she always just dreamed of going outside with friends and hang out with them and maybe even go shopping or to the cinema but these were just some silly dreams that would never be reality.
One day, Sora (15) went to the city with her mother and could see advertising for an audition to become an idol. She was grabbing onto her mother's arm and pulled her sleeve. "Mother! That could be my chance!" She says excited and pointed at the poster that was hanging on the mall's hall. But her mother was against it. "How dare you to even look at it! We have more important stuff to do than becoming a puppet for the public!!" And grabbed her daughter's wrist, dragging her out of the shopping mall.