Heart of a Princess (プリンセスハート, Purinsesu Hāto?, lit. "Princess Heart") is a technique in Kingdom Hearts III Re Mind. It allows the user to summon hordes of magic spheres and have them rain down on nearby enemies.
In Kingdom Hearts III Re Mind, Heart of a Princess is the default Shotlock of the Destiny's Embrace Keyblade with a max lock of 1. When activated, Kairi leaps into the air and creates multiple balls of magic, having them all fly down at an opponent while she flies around the battlefield.
Learning Heart of a Princess
Kingdom Hearts III Re Mind