
In One Piece is teeming with memorable characters – whether through their design, their stories, or their quirky nature. While big names like Buggy the Clown often take the spotlight, there are many side characters who leave a lasting impression despite their brief appearances.
How were the characters chosen? With over a thousand characters in One Piece, it isn’t easy to make a selection. This list does not focus on the most powerful or important figures but on smaller roles that remain particularly memorable due to their personality, design, or unexpected appearances.
Here is a trailer for the 12th One Piece feature film, which can be watched on Crunchyroll:
1. Caribou

Who is he? Caribou is a pirate captain and an antagonist who later becomes a kind of running gag character in One Piece. He is the leader of the so-called Caribou Pirates, along with his brother.
Caribou has eaten the Swamp Fruit, a Logia fruit that allows him to turn his body into swamp. With it, he can suck people into himself, hide things, and move almost incorporeally. Caribou appears after the time skip on Sabaody Archipelago.
What makes him iconic? Caribou is known for his slimy nature and cunning personality. He has absolutely no qualms about acting deviously, deceiving people, or even killing.
He uses his body as a mobile storage, in which he hides weapons, people, or other items. On Fish-Man Island, he even attempts to kidnap several mermaids and steal the entire treasure of the royal family this way. Although he gets caught, he does not disappear from the scene – instead, he keeps reappearing in the series.