Kingdom Hearts: Supreme Adventures & Divine Rebirth-- The Legendary Guardians of Light & Darkness is a fan fictional series remake of Kongdom Hearts.
Sora's main party members are Donald Duck and Goofy, with the additions of Aqua and Lightning Farron.
The main pairing is Sora / Aqua / Lightning, along with other pairings which will be revealed in the story.
Lucem is the daughter of Master Eraqus, she became a Keyblade Masters along with Aqua.
This story also features new Disney Worlds which were never added to The Kingdom Hearts universe.
Aqua & Lucem was not trapped in The Realm of Darkness, they was saved by Xemnas and sent to Destiny Island to train the new generation of Key Blade Wielders to defeat Xehanort.