Shadow Ninjas are a very secret and elite group of Ninjas. Few have passed the many tests to become a Shadow Ninja. The Shadow Ninjas are led by the mysterious Shadow Sensei. The uniform of a Shadow Ninja is a special black ninja cloak suit that can turn completely invisible on command. Nobody has ever seen the true identity of a Shadow Ninja before, and do not consider themselves part of the other types of Ninja clan. They prefer to be called shinobis as it is there official name, however, they still stick to Shadow Ninja. Though their hideout is very secret, the name of the hideout has been leaked, along with other things about the mysterious Shadow Ninjas.