Luke is a young boy with light-blue hair and red eyes. He wears a dark-brown shirt with a red-colored gear on a spike design, khaki pants with a black belt and black shoes with blue stripes. He also sports many accessories: a black collar around his neck, a purple-wrist watch and a blue knot on his left hand, a black wristband on his right arm, a chain tied to his right waist and a black case around his left knee.