She lived with her family before the foundation of the squad. During that time, she made many friends. When she was 10, she met a Mythical Pokemon called Manaphy, who she named Mana, and managed to befriend her after spending time with her for almost a week. About a year later, she evolved into Sylveon.
One day, when she came back from playing with Mana, she met Pearl on her way home. A few days later, she accepted to live with her and the others.