Chapter 1: A song?

A girl abandoned at the Strawberry Battlefield was found by the Crystal Gems. She posesses a mysterious power related to fire and ice. (Kind of like Todoroki from BNHA)

She was abandoned for thousands of years, living off of the strawberries and occasional rainwater at the Strawberry Battlefield. She was focused on surviving.

But one day, she discovers her power. Will she join Homeworld and INCINERATE the Earth, or will she join the Crystal Gems and help protect the Earth?

And then, she discovers a boy. He also had a gem, on his arm, while hers was on her back. What does the boy have to do with her? Will they betray the Crystal Gems, or join them.