In the Inuyasha series, when Kagome Higurashi is pulled into the Feudal Era through the Bone Eater's Well, the Shikon No Tama (Jewel of Four Souls) is discovered to be hidden inside her own body. This explains why demons are drawn to her - the jewel was burned with Kikyou's remains and reincarnated within Kagome, who is Kikyou's reincarnation.