No... I think that should be everything. The setting outside of the little island isn't stated so I should be able to just take some liberties with the Elan and such to describe the backstory without worry, the outside world won't matter once she's on the island, and the stats have been done for a while now.
I'll get to work on the backstory immediately, how soon are you thinking of introducing Rose into the game?
Edit: Here's the tentative background unless you have an issue with it.
It's been 6 years since she underwent the process to become an Elan. She can be kind of cold and unempathic. She's usually focused more on her own pursuits than that of others, seeking out new experiences, or to better understand her chosen mantles, without much care for how this will impact other beings. She is not malicious in her pursuits however, mastering the sword for a love of the blade, not some desire to make a living off her skills, and prefers to avoid conflict whenever possible.
Backstory: Rose was once a human male by the name of Arngrim Milstein with a girlish figure. A swordsage who had grown to a position of some acclaim in his younger years, mastering every maneuver of the Desert Wind sword-school, who'd grown tired and despondent in his old age. Having nothing left to attain in his art, he learned of the Elan one day, and was seduced by the promise of a new life, the chance to start over, reinvent himself, and master the arts all over again.
He was able to impress the Council with his skills with the sword, but the one in charge of the conversion ritual mistook him for a female at first and so when he awoke he learned that he was now a she.
She was a bit surprised by the change, but found it somewhat liberating at the same time. The Elan were not capable of reproducing sexually after all, so there was no real difference between male and female, and it wiped all thoughts of returning to her old life from her mind. She had wanted to start over, and this gave her even more incentive to do so. Taking the name Rose, she set out remastering her sword techniques from the ground up, guided by hints and whispers of her old life, memories now seeming to belong to another person, reliving the thrill she had experienced when she first mastered the maneuvers oh so long ago. She also expanded her understanding of the being she had now become, focusing on certain core principles to focus her psionic power while incorporating it into her style. The mantles as she called them she chose to explore were those of creation, as she had been created anew, and freedom, as the obligations of her old life had been lifted from her shoulders and she was now free to live a completely new life. Later, as she began to reach the peak of mastery over her blade once more, she expanded her exploration to the mantle of Pain and Suffering, something inherently tied to the art of the sword, and wished to expand her understanding even further.
While humouring her exploration of this mantle exploring a trap filled dungeon Dedicated to Boccob, the god of magic, her companion, a wizard, discovered a strange and powerful scroll said to be scribed by the god himself capable of teleporting the caster and three others to any place in the world.
When they later found themselves trapped facing a dragon of all things he did not hesitate to use the scroll in an attempt to escape to freedom. The power necessary to use the scroll proved to be far beyond him however, and he lost control of the spell. Rose appeared in midair over an unfamiliar island with no sign of the wizard or idea of where she was now. Perhaps this too would be a chance to experience something new.