Luka, a fair-skinned man with bright red hair and blue eyes, sports a gray mechanical arm to replace his lost right limb. In battle, he switches to a larger red mechanical arm with thrusters, capable of launching its fist as a projectile. He wears a red vest with a silver flame emblem, a torn white T-shirt over a tank top with molten designs. A black arm band and glove adorn his left arm. His lower attire includes brown pants, black shoes, a red belt with a golden buckle featuring a silver fist.