Jason wears a Black Bandanna over his blood red hair, He has red snake-like eyes and grins most of the time except when he serious. He also wears a long black sleeveless coat with the straw hat jolly roger on the back, with a t-shirt with a grim reaper on it. He also wears long black pant with black cowboy boots under the pants leg.
He acts a little goofy sometimes, but he show some real intellect. For instance nobody knows this because Admiral Akainu (Sakazuki) is embarrassed by it. he thought he was a low level pirate intell Jason used his power to manipulate Psychic energy to do Hydrokinesis to make a bubble of water to turn his magma fist into black stone that Jason proceed to smash. Thanks to Akainu's Devil Fruit being a logia, he regrow a new arm, after that Jason disappeared. He is also loyal to his friends.