Byrnndi World is the captain of the World Pirates and the main antagonist of the 3D2Y anime special.[2] He is a former prisoner of Impel Down's Level 6.

World is a very tall broad man with large arms. He has a green beard and a W-Shaped mustache that is a lighter shade of green, and also wears a horned helmet that has had one of the horns broken. He also appears to be missing some teeth and has a scar on his scalp. He wears a black and purple open sleeveless coat, green pants, a brown belt, and brown shoes.

(Source: One Piece Wiki)