Kairi (KH)

her being kidnapped was the reason Sora (the main character of the game) had to go off the fight Xeanort in the end Sora won but not before Kairi was shattered Sora set off to find her heart and was successful in bringing her back but Sora never returned now you a random person who fell into this world and now you and the other characters Mickey, Donald, Goofy, Riku, Namine, and obviously Kairi (credit to Disney for the characters)