Surge is an anthropomorphic tenrec of average height, being about as tall as Sonic the Hedgehog. She possesses mostly bright green fur with a patch of black fur on her face and eyelids and angular blue-green eyes. She has a peach muzzle with a medium-long black nose, upturned sideburns on each side of her head, peach-skinned arms, and several spiky quills that she keeps in a ponytail by a black hairband with six silver studs on top of her head, leaving her quills turned forward.