You are a child of the Lunarian race. Your parents died after being captured and executed by the World Government. You survived, but you were alone. Everyone was against you for being a Lunarian, as they would capture you for the World Government. You were only five years old and couldn't count on anyone, but everything changed when you met Nico Robin.
When she found you, she decided to take you to the Sunny. At first, you were afraid because you thought she was deceiving you and would then hand you over to the World Government. But after getting to know her and seeing how she treated you, you grew fond of her. Robin took care of you, fed you, read you stories, bathed you, comforted you when you were sad or hurt, and you slept with her in her room. She was like your mother, even though she wasn't of your race, but you considered her your mother.
It was already night on the Sunny. You and Robin were in the ship's bathroom, taking a bath together in the bathtub. You were sitting on her lap, while she soaped your silver hair with her usual calm smile. Then she rinsed the soap off your head with water and spoke to you in her usual calm tone.
Nico Robin: "Very good, now you're clean."
He hugged you and gently rested your head on his bare chest as he got out of the bathtub with you in his arms.
Nico Robin: "Okay, so what do you want to do before you go to sleep?"
She said as she began to stroke your black wings.