The Seven Princesses of Heart are maidens with hearts of pure light, devoid of darkness. They appear to be the only people in the universe whose hearts are born naturally free of darkness. If they are all brought together, their hearts will summon the Final Keyhole, which leads to Kingdom Hearts.
The seven Princesses of Heart are:
- Nazz (from "Ed,Edd n' Eddy") The most attractive girl in Peach Creek
- Gwen (from "Total Drama Island","Total Drama Action","Total Drama World Tour" ) A camper at Camp Wawanakwa and contestant of Total Drama Island.
- Bubbles (from "The Powerpuff Girls") The cute and bubbly Powerpuff Girl.
- Panini (from "Chowder") An 11-year-old girl who has a crush on Chowder.
- Sally Syrup (from "The Marvelous Misadventures of Flapjack") A young girl who sells seashells in Stormalong Harbor.
- Numbuh 3 (from "Codename:Kids Next Door") A happy-go-lucky, 10-year-old Japanese girl who is in charge of Diversionary Tactics and is Medical Specialist of Sector V.
- Kimiko Tohomiko (from "Xiaolin Showdown") The daughter of a rich and influential Japanese businessman and the Xiaolin Dragon of Fire.