Friendly humanoid, 1.8m tall, sturdy build. Slim torso with a soft, human-like belly, shiny gray metal, rubbery spikes on back. Thick arms, big padded fists for punching. Short legs, bouncy flat feet for kicking. Blocky head, wide grin, tiny red eyes, spiky hair like a brush. Glossy gray with colorful stripes. Joints clear for punches, kicks. Spikes wiggle playfully.