Sapphire discovered that Wise Man had just using the Black Moon Clan for his own purposes all along. He tried to destroy Wise Man's crystal key card but is caught and injured by Wise Man. He sought refuge in Tokyo, with the Ayakashi sisters, where Petz nursed him.

Sapphire's great love for Diamond prompted him to go off and warn his brother despite his weakened condition and Petz's protests. He promised Petz he would return. Sapphire was mercilessly blasted to death by Wise Man in front of Diamond and Sailor Moon before he could say anything...