I made sure to change a few things, but I would still like to give credit to @Rainboshin for the original!
This is my Steven Universe character, Moonstone. When she lived on Homeworld (when it was still around), she spent every moment with her best friend, Aquamarine. But they accidentally fused once, and Aqua accepted the full punishment in Moonstone's place, so my poor child lost her best friend. She then moved to Earth, where she met Steven and his friends. The first one of these friends she met was Connie, who soon became close friends with her. M (as Aqua and Connie called her) started battle training with Pearl, and that was when she discovered the truth about moonstones. Moonstones are the result of a very strong and loyal friendship between a pearl and a diamond, and there can only be one moonstone at a time. M was very self conscious about her powers, and whenever she would get discouraged from battle training, Connie would drag Steven into the conversation, and the two would cheer Moonstone up. She has always been very shy, and for a good part of her time on Earth at first, she prefered to be alone. Once she started spending more time with Connie, however, she grew out of her shy, anti-social stage. She can create any weapon she either needs or wants at the moment. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This is just a fan based thing. All of Moonstone's story above is just something from the dregs of my tired mind. I made this at 2:30 in the morning, so you really can't blame me if the story seems off. If there is anything that seems little strange about the backstory, just let me know in the comments, and I'll fix it. Also, I'm only on the first season of Steven Universe, so some of my facts may be a bit off because of that.