Four Maidens Of Heart

The Three Maidens Of Heart (スリー・メイドンズ・オブ・ハート3 乙女) are maidens with hearts of pure light, devoid of darkness. They are the original three maidens of the universe to whose hearts are born naturally free of darkness.

They were the original Princesses Of Heart way before the time of the Heartless, Nobodies and Unversed but of the time of the Abominations and their reign of darkness and terror upon the worlds which ultimatley swallowed all the worlds in darkness until the Three Maidens shattered half the light in their hearts to pass it onto coming children who rebuilt the worlds.

The children were to be the Seven Princesses of Heart as coincedentally the light seperated from the original Maidens Of Heart became that of seven girls.

Origin
The Three Maidens of Heart came following the Keyblade War and were created as the universe was rebuilt for the first time thanks to the lights of surviving children.