Rex is, and always was, Kayne's partner in crime and terrorism. He has nothing but hate for the world around him, growing up on the Egyptian plains alone, hungry, and abused. Rex uses his mask of the Egyptian God of death, Anubis, to protect himself from anyone seeing his real face and finding him. He is strong both in body and mind and, at times, has to force Kayne to do a act of crime against the law.