Marzo is slightly taller than Leonardo. He has green heart-shaped scales with a peach underside, two yellow reptilian eyes with single-lashes, and a extra eye with multiple lashes. He has pastel-orange hair in a wild style. His mutant-features include: four arms, a humanoid face with no mouth, one mouth above his chest, a shorter tail, and thick peg-shaped legs. He also has three fingers for each arm.
He wears the same clothing as Leatherhead; but with white thigh high socks, bandages on all four arms, and brown boots that matches April's bow.
Marzo's legs and arms can formed into any shape and edge. This includes forming into them into knives, blades, and claws.
Marzo's perspective is controlled by April, while his fighting style is Leatherhead's. He starts out as smart and thought-out; but he is also aggressive and trigger-happy (can be caused by Leatherhead)
- Marzo's name is Spanish for "March"