Kairi is the tritagonist of the Kingdom Hearts video game series.
Kairi is also a Princess of Heart, one of seven maidens whose hearts hold no darkness but only pure light, and is needed to open the Final Keyhole to Kingdom Hearts.
She is voiced by Hayden Panettiere (who also voiced Dot in A Bug's Life) in Kingdom Hearts, Kingdom Hearts II, and Kingdom Hearts: Birth by Sleep, Ariel Winter as her young self and Alyson Stoner in Kingdom Hearts III.
Kairi is caring, kindhearted, wise, supportive and outspoken, although she quickly becomes determined and courageous when someone she cares about is in danger. Her sociable, charismatic nature enables her to quickly befriend others comparable to Sora's ability. At fourteen years old, Kairi was somewhat brash and bold, but by KH II, she has become more mature, responsible and wise, although she still retains her tomboyishness and bravery.
Kairi is usually optimistic and upbeat, but she can be rather stubborn sometimes. When faced with a challenge and to protect her friends, Kairi becomes quite loyal and headstrong.
Kairi is able to wield a Keyblade due to her having touched Aqua's Keyblade many years prior to the events of Kingdom Hearts. Kairi's abilities in combat are limited. Kairi cannot do much when she is in danger, she has to depend on Sora or Riku to come to her aid, and as such, she is fairly easily captured. This is seen when Axel merely grabbed Kairi by the wrist and effortlessly dragged her along with him.