Basically it's a story about strong an independent white girl, who chooses her own path. Language isn't that horrible, minor swearing. I don't own Fullmetal Alchemist. If I did I would be rich.
Rayleigh is saved by Hachi from a ship wreck, but what do we really know. There are gaps in our information. How did Shakky meet Hachi when the discrimination was so rampant on Sabaody? Disclaimer: I don't own One Piece.