Marin is a large, overweight man. He dresses like a woman due to being forced, with long blonde hair and makeup. He has stubble around his mouth and sports a swimsuit that covers his chest. He wore a fake mermaid tail, and had a slave chain around his neck.
Marin seemed quite tired and distressed while swimming in his aquarium-like cell, since he is not a real mermaid and can not survive in water.
Sabaody Archipelago Arc
Sometime before he was presented to Luffy, Hatchan, and Pappag while they were searching slave shops for Camie, he was captured by slavers and became a slave. Marin was restrained by a chain collar and could barely swim in his aquarium-like cell. The owner of the slave shop presented him to the group, but the terrible disguise did not fool them (not even Luffy).
- Marin is a French word that translates to sailor, or "from the sea".