Shushus are demons foreign to the World of Twelve, coming from a hellish world ruled by the most powerful among them, King Rushu.
Some Shushus have somehow crossed over into the World of Twelve and they are usually sealed within objects and overseen by a knightly order known as the Guardians of Shushus.
Shushus love nothing more to destroy and wreak havoc, they are devious, wicked, and selfish even to their own kind.
An object containing a Shushu can possess magical properties and the Shushu can still speak, see, and hear though they cannot move as they are trapped inside inanimate objects. However, a Shushu can possess someone and run amok using their host.