A/N: I am so sorry, but my story is being difficult, so I'm just going to tell you the basic idea of the story.
As you can probably guess, the story is about a girl named Petra Pan, who is the twin sister of Peter. She got exposed to a magical powder called Starstuff, and that gave her unbelievable magic. She later used this magic to take the innocent children of Earth to a world she hurriedly made as Earth was destroyed by the darkness. For years everything was peaceful, then the kids started outgrowing the original home planet, so she started making new worlds. After many years, she had to make a weapon to keep Captain Hook under control. By accident, she fell asleep while making a sword, resulting in a keyblade.
She made other blades and went out into the world and gave them to people with pure hearts. But as the years progressed, darkness grew in her heart. In fear of what would happen if darkness overcame her heart, her best friend and co-wielder Matthew (not Matt, he hated to be called that) cast a spell with her that fed her darkness to him in exchange for his light. The spell worked too well, and she watched in worry as he slowly went into the darkness. However, due to the spell, he remained completely loyal to her still.
Not long after that, they retreated back to Neverland, and in their absence, the Keyblade war waged. She created a new location for the keyblade academy, and presided there herself, making new blades between her students. Centuries passed, and one of her students proved himself worthy of teaching the next generation. Yen Sid taught Xehanort and Eraqus, and things seemed to go well, despite Xehanort's desire to know more about the war. Then one day, in a fit of rage, he accidentally cut Star, as she was then known, off from her source of magic. She fled to Radiant Garden, where she ended up raising three boys, Isa, Lea and Ventus. Ventus quickly proved that he was the host of the X-blade, and Star was reluctant to let him learn to wield a keyblade. But once he summoned one for the first time, she could no longer have him around her, or else she would die, along with the keyblades.
She gave him to Xehanort, hoping that his reason would overrule his passion, even threatening his life if anything happened. Nothing worked. She hunted him down and cursed him that a keyblade wielder would always step in and ruin his plan when he was in sight of his goal. It carried all of the way through the adventures of Ven, Sora, and Roxas, who she ended up saving because she felt him grow a heart completely separate from Sora. Years later, her son Lea came back for her, following instructions on a note to revive her magic, he did so with the help of Roxas, whose name was turned to Raso when Star woke up.
Not long after that, Sora was injured in a lightning storm at was created by...you guessed it...Larxene and Xaldin. Star healed him, but it would end up taking months for him to get the strength in his legs back. When she healed him, she took the essence of Xion and Ven's heart from Sora and decided to bring them both back. With Ven it was not that hard, she just had to heal his heart and put it back in his body. However, things with Xion were more difficult. First, a heart of pure light had to be made from the essence and memories. Then a body was formed around it, looking faintly similar to her puppet form.
When all of the keyblade wielders were gathered on the island where the school was then located (since Land of Departure was basically destroyed, she moved it to an uninhabited island in the Destiny Islands), she split them into training teams (Aqua was exempt due to passing the test). Terra was paired with Sora, who would need someone physically strong to help him while he was stuck in a wheelchair. Riku was paired with Raso to try and get rid of the animosity between them. Ven with Cia (Xion's name that she chose for herself) since they didn't know each other that well. That left Kairi with Lea for the same reason Riku and Raso were paired together.
A/N: Again, I am so sorry that this got stuck in a rut, and I will revamp it later like I do with many of my stories. No guarantees when though.