Mercury Jasper is a snakeneck and the first mate of the One-Eyed Pirates.
Jasper has a long neck signature of his race. He has a thin, yet muscular body. His curtained purple hair messily frames the sides of his face.
He wears a scarf resembling a coiled snake that completely obscures his neck because of his insecurities over it, and a camouflage long-sleeve shirt with beige-colored pants tied by a sash and tucked into boots.
Jasper is quite cunning. He is somewhat embarrassed about his long neck, feeling the need to cover it up whenever he can. He also drinks a lot.
Abilities and Powers
Jasper has displayed impressive physical strength.
Jasper ate the Mythical Zoan-type Hebi Hebi no Mi, Model: Ouroborosl.
Jasper is proficient in Busoshoku and Kenbunshoku Haki.
Jasper keeps a pair of pistols in his sash.
- Jasper's name in Japanese contains jya (ジャ), another reading of the kanji for snake, 蛇.
- Another reading of jya in the context of the aforementioned kanji is "heavy drinker", one aspect of Jasper's character.