The Soul Shadow is a type of Youma used by Nephrite. Nephrite disguises himself as a female attendant to get close to Princess D. Once she and Nephrite are alone in the room with the treasure he believes is the Silver Crystal, Nephrite begins to attack her, but is interrupted by Ami and Rei. He sends his shadow into Princess D, possessing her to try and escape with the treasure. When the guards try to stop her, she engulfs the room in darkness. Once confronted by the Sailor Senshi, the shadow emerges from the princess, revealing Nephrite's true appearance. Sailor Mars tries to use her powers to destroy it but it is unaffected. Sailor Moon, using her new tiara, blasts the shadow with light reflected from the moon and it is destroyed.