Simplify the following text for a Grade 5 native English-speaking person.
Original: Maleficent sows distrust in Riku , telling him that Sora abandoned him and Kairi for new friends and the Keyblade . An increasingly antagonistic Riku finds Kairi 's body , but can not find her heart .
Simplified: Their world is destroyed , and Sora , Riku and Kairi end up on different worlds .