Rose is on a simple mission. Find the bastard that took their mother and find out what happened to her.

They've got the tools: a Devil Fruit that turns the world into a game interface, space to grow, and the ability to get stronger with every other user they meet. They've got knowledge of how canon is supposed to go. They even have some high-level skills before the trip starts! (With some crucial drawbacks.)

It's the Straw Hats - and a blend of preconceived notions and pre-existing bonds of Rose's new life - that make it complicated.

Rose might find a dream of their own. They might find family they lost or never had. Or they might even turn into a monster the likes of which haven't been seen for over two decades. It all revolves (as many things do) around one future Pirate King.

...at least the crew seems mostly okay with the whole gender thing.