Simplify the following text for a Grade 7 native English-speaking person.
Original: Their old priestess , Kaede , recognizes Kagome as the reincarnation of her sister Kikyo ; when the centipede demon returns , Kaede realizes that the Jewel of Four Souls has also been reborn in Kagome 's body .
Simplified: She meets Kaede , an older one because 50 years passed in this world after what happened to Kikyo . Kaede finds out that Kagome is the reincarnation of her own sister , and helps her keep the real shikon no tama that Kagome suddenly found in her body .