The Doll is a purple, high-tech, latex bodysuit. First worn by Nadia, this suit was equipped with unknown weaponry.
The Doll was later updated to be in line with the Metal Device. It has various external weapons and transport controlled by a nerve interface. Unfortunately, it also has the same drawback of depleting enormous amounts of energy. The current wearer, Fio, is always ravenously hungry.
The current Doll has two sets of jet thrusters, mechanical drill claws, and rear cannons each. Fio normally uses her jet thrusters to close in on the enemy before shredding them with her drill claws. Her rear cannons fire piercing shots at a small arc.
Fio's Doll is stun resistant. When attacked with stun-capable weapons, she instead raises her arms to block projectiles before firing two shots from her rear cannons.
- The Doll is reminiscent of the bodysuit used in the Gantz series.