The answer
Chapter 506 · updated
Crocus joined the Roger Pirates to look for the pirate crew connected to Laboon. Rayleigh says that finding a particular crew was Crocus's main reason for accompanying them; the Straw Hats connect his search with Brook and his companions. ch. 506, p. 11
Crocus also served as the ship's doctor. The Roger Pirates recruited him from Twin Capes because he could ease Roger's suffering from an incurable illness. He travelled with them for three years. His personal search explains why he accepted the voyage, while Roger's illness explains why the crew needed his medical help. ch. 506, pp. 10–11
Where it happens
1 chapterWhat this means for the story
Canon settled the fact. The meaning is still an argument.
Make the case for what the answer changes, and bring the chapters that back you — the same evidence that settled the question can settle this one.
- 01Write the claimOne sentence a reader can agree or disagree with.
- 02Cite the chaptersEvery point carries the page it comes from.
- 03Readers weigh itConfidence moves on the evidence, not on votes.