A retired pirate out of the East Blue, Gaimon has his torso permanently sealed inside a chest and spends decades posing as the watchman over the Island of Rare Animals. The five chests he long guarded turn out to be empty, yet he stays on to protect the odd creatures he now calls his real treasure.
Gaimon's face takes an unusual pear shape, crowned by green hair and a heavy single brow. In youth he stood at ordinary height with a thin, scrawny frame. A mishap soon after he reached the Island of Rare Animals crushed nearly all of him down inside a chest; only his skull, his hands, and his feet stayed loose, and a single tooth was knocked free. Over the twenty years that followed, a wide beard and an even larger afro grew in, giving him the look of a walking shrub.
During his pirate days, greed defined Gaimon, and plunder was nearly all he cared for. Long stretches of solitude wore that hunger down without ever erasing it, teaching him to prize calm and companionship above any riches. He still guards fiercely whatever he labels treasure, which leaves him wary and hostile toward strangers at first. Once a person earns his trust, though, he turns remarkably warm and helpful, especially toward others who have been marooned.
Gaimon once sailed aboard the Machina Hallelujah among a crew of roughly two hundred. Chasing reports of buried riches, they searched the Island of Rare Animals for three weeks and found nothing beyond one empty chest. As his captain prepared to leave, Gaimon climbed the steep cliff the crew had ignored and discovered five chests waiting at the top. Turning to call out the news, he slipped, dropped into the empty chest below, and was knocked senseless; he woke to find the ship gone and his body trapped in the box. Posing as the island's guardian, he drove off newcomers for twenty years and befriended the rare animals living there. When Luffy shrugged off his pistol, Gaimon finally met a group he could not scare away, told his story, and watched Luffy scale the cliff only to confirm all five chests were bare. He declined the chance to sign on with the Straw Hats, choosing instead to look after the animals he treasured, and later found lasting company in Sarfunkel, a woman likewise stuck inside a barrel.

When I first decided to commit to watching One Piece seriously, I knew I was embarking on one of anime's longest and most beloved series. With over 100...

The transformation everyone knows, the follow-up question nobody would touch. Why we made a smooth R&B track about the golden glow Dragon Ball never talks about....
Gaimon was a pirate who fell into an empty treasure chest atop a cliff on the Island of Rare Animals, permanently trapping his torso inside it. He then spent twenty years posing as the island's guardian while protecting five sealed chests he believed held treasure, only to learn from Luffy that they were empty all along.
Yes, Gaimon is a canon character who appears in the manga's original East Blue storyline rather than as a non-canon game or movie exclusive. His backstory as a marooned pirate guarding the Island of Rare Animals is part of the main story.
Gaimon chose to remain on the Island of Rare Animals rather than travel on, and he later found lasting companionship with Sarfunkel, a woman likewise stuck inside a barrel. He continues watching over the rare animals he considers his true treasure.
No, Gaimon declined the chance to join the Straw Hat Pirates when Luffy offered it. He chose instead to stay on the Island of Rare Animals and look after the animals he now treasures.
Gaimon has an unusual pear-shaped face crowned by green hair and a heavy single brow. Nearly his entire body has been crushed down inside a chest since his accident decades ago, leaving only his skull, hands, and feet free, and over twenty years he grew a wide beard and a large afro that make him resemble a walking shrub.
Looking for more on Gaimon? The One Piece Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the One Piece anime series, manga, and official materials. Episode and chapter references are cited where applicable.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:
Official resources:
Daddy Jim Headquarters maintains this encyclopedia. If you spot an error, a translation issue, or something that doesn't look right, let us know.