This is based off the Steven Universe TV show.

Garnet, Pearl and Amethyst found a small baby in a dark alley in the middle of the night. This baby had a gem on the inside of her left hand and a small tattoo on her right that says "Human". This baby girl was used for experiments. She is two years older than Steven and has a green (Emerald) Gem. And her name is Alexander Crystal Gem or just Alex. "Welcome to the family Alexandra Crystal Gem," Garnet said holding her in her arms.

Monkey D Mikasa is the older sister of Monkey D Luffy. She is helping her brother to achieve his dream (to become the king of the Pirates), to find a crew and so on. On their journey, they find new crew members, new friends, new adventure but also new enemies. But what is Mikasa's dream? What's her role in this story? And will she be able to make her nightmares stop? RobinxFemOC