Ratchet

Ratchet is a lean man whose light brown hair is parted in a sharp seven-to-three split, and his narrow brown eyes lend him a menacing cast. He wears baggy yellow overalls that leave his thin chest bare, paired with a thick black scarf patterned in red gears. His round, pale orange glasses have a mechanical look, complete with windshield wipers built into the frames.

For all his gifts in mathematics, science, and astronomy, Ratchet badly overthinks everything and is short on plain wisdom and common sense, unable to crack Mecha Island's riddle without the Straw Hats' help. Faced with a pond to cross, he correctly grasps that the water must be drained, then proposes everyone simply drink all of it. Arrogant and full of himself, he routinely underestimates opponents, watching mech after mech fall to a single attack from Luffy. He comes across as a booksmart but petty, vindictive, and ineffectual man puffed up with delusions of grandeur.

Ratchet is a phenomenally gifted builder, the maker of every machine on Mecha Island, including the battle suit for Honki and the apparatus used by Maji. In his duel with Luffy he piloted a series of clockwork Powered Suits, each fitted with a winding key in its back. These included Zogame-kun 5-go, a turtle-shaped transport with a rotating shell; Tetsujin-kun 28-go, a battle suit armed with a launchable drill, grappling claws, and magnetic feet; the larger, amphibious Tetsujin-kun 32-go with its cannons and spiked arms; and the immense Super Zogame-kun, a power-hungry tortoise machine bristling with cannons and a rocket-firing claw.