Sarah

Sarah is a girl who is in the gymnastics class with Megan. At first, she is a mean girl and puts Megan and others down, but she becomes kind after she falls in a lake, nearly drowning her.

She later gets a crush on Megan and when she expresses it directly to her, she is hurt again since Megan only feels that way about boys, while Sarah is a bisexual girl.

At the end though, she asks to be forgiven and even replaces Megan in the friendship trio after her death.