|Kingdom Hearts 3: _____/Kingdom Hearts III: The Return of the Chasers|
|First Appearance||Kingdom Hearts 3:_____/Kingdom Hearts III: The Return of the Chasers|
Kaen is a new original character of the Kingdom Hearts series. In both games, she is a fiery spirited teen, she is Riku's age, and she is the younger sister of Lea, who is better known for his nobody, Axel. During the respective games, the heroes come across this fellow Keyblade wielder on their journeys, while she is on a search for her older brother, who had disappeared years ago. Her Keyblade was drawn to her by her natural strength and unwavering will to find her brother again.
- She was given the name Kaen because it means flame (=fire) in Japanese, and it completes the 4 classical element theme of Sora "sky"=wind, Kairi "sea"=water, and Riku "land"=earth.
- An alternate version of this character also appears in Kingdom Hearts: Fates Entwining and Kingdom Hearts III: Cord of Destinies.