Rukinosu is a living doll, who has the essence of one of the 12 Reverse Zodiac Braves, The CancerAstralArmored BraveCancer. He was summoned by Miroku. Once appearing, he made a mess of crab shells in space, and destroyed the gate to the third class. Miroku had him watch as Rei battled with Hansoro. He claims to remember Rei from the past.