Insidious

Insidious is actually Kai's Twin brother Kaiaphas. Kaiaphas turned to the dark side for an unspeakable crime. The counsel was going to give him a death sentence, but they realized that he was too good for death. So instead they locked him up in prison for two years. Kaiaphas met the leader of the dark side. He liked Kaiaphas and decided to take him in. The leader of the dark side gave Kai a new name. A name that everyone would fear. And that name is Insidious. Insidious is still very protective of his Daughter.Insidious is impossible to kill or touch, unless your are his daughter or father or his innocent niece