The Rosettos are a group of four robotic-looking Nightmares who are in charge of creating deadly weapons to cause attacks in multiple places.

Among all, there is the red Rosetto.

He is the head of the group and the one in charge of creating the weapons, and using them of course.

Meanwhile, the blue, yellow and green Rosettos are the ones looking for the objects that will be used to create these weapons.

These three are also differentiated by how good they are at finding objects, as well as how intelligent they are.

(This information can be seen in the following artwork through a star rating)

The objects to create weapons can be plastic, wood, clothing, toys, and even other objects. All of these are gathered in boxes, and the essential ones are chosen for the next attack they want to create.

After this, the chosen objects are placed in the microwave that the red Rosetto has, in order to fuse them and create a deadly weapon.

Weapons such as explosive toy locomotives, pistol pencils or chainsaw swords can come from the mortal mentality of the red Rosetto

Something they have never dared to do is use human bodies to create weapons. Likewise, the red Rosetto only cares about murdering people for fun and creating fear in the worst situations.