Rikiddo has been called the Assassin of the Hidden Mist; this is because during his childhood, he had killed over 1000 of the ninja academy graduates attending their final exam. In the exam each student would be pitted against the other in a battle to the death. His fame grew over the years, as he became both a Jonin and a member of the Seven Ninja Swordsmen of the Mist. He eventually attempted to kill the Daimyo, and subsequently fled. Just before leaving the Village he discovered his kekkai genkai, that allowed him to combine the wind and water elements to bring forth ice. He began training to be the ultimate weapon.