Kairi is one of the tritagonists of the Kingdom Hearts series.
Kairi was born and raised in Radiant Garden by her grandmother.
Kingdom Hearts: Birth By Sleep
She is first seen being chased by Unversed.
She plans to leave Destiny Island with Sora & Riku to see other worlds.
Kingdom Hearts II
She is seaching for Sora, her love intrest, who went missing at the end of Kingdom Hearts.