(Not common information)

Kuroko are, according to the legends passed down amongst mages of the Sphere of Spirit, ghost-like beings with semi-substantial forms, capable of affecting and being affected by physical matter to some degree. They are often associated with the undead, but not believed to be truly spirits of the dead themselves. In fact, certain powerful Necromancers are purported to be able to create these quasi-intelligent entities to do their bidding, provided they can maintain control over them. These monsters are also known as the "puppeteers".