Gad is a muscular, teal-colored fish-man with black hair shaped like the head of a hammer, sideburns, a pointed nose, pointed chin, thin face, thick lips, and thin eyebrows. He wears a blue and white tank top, an orange shirt, black shorts, orange sandals, and gold piercings in his ears and nose.
Gad is a very pompous fish-man and cares greatly about his appearance. He is easily smitten by beautiful women, developing heart-shaped eyes when looking at them. No matter who's suddenly attacked, he makes no bones about saving others from dangers, even if objects who need to be saved are the Straw Hat Pirates that ever attacked him.
When a large water vortex appeared in front of the Straw Hat Pirates' ship, Gad appeared out of the ocean and destroyed the vortex. He landed on the deck of the Going Merry in front of Luffy. He immediately became enamored with Nami, angering Sanji. The Straw Hat Pirates fought Gad and defeated him, causing him to run. Despite being defeated, Gad left the ship badly damaged.