So I went down about 8 pages and all I saw on dimension hopping was bringing chars from 11 to 14. Some of my facts may be wrong so putting it here.
From what I understand Hydaelyn is the crystal of light and light aligned shards , worlds, dimensions, whatever you want to call it orbit in her sphere. Zodiark is the crystal of darkness and dark aligned worlds, shards, dimensions, whatever orbit in his sphere. I do not mean total conversion of only light or darkness, but where the balance has seriously turned one way or another. Given the warriors of darkness story line I decided on the following for a char of mine.
Due to all the crap going on in the various worlds and them falling to light or darkness instead of being in relative balance this has given rise to Chaos, much like the Chaos from FF1. This is a intelligent entity that prowls the worlds and converts them entirely from order back into utter chaos. It basically decontructs a world, or a dimension that is heavily out of balance and obliterates it, and the timeline of that existance starts over. Some people from a world do get away to other shards.
Enter Doloria, my nice little Au'Ra who was a warrior of darkness on a heavily light infused world when Chaos found it and invaded it. The worlds military and plitical structures melted. There was no Empire, no Doma, no city states, just the living and the unmade. The entire planet save for Mor Dhona had been converted to primal chaos and the survivors planed to pool everything they had into the crystals all over the landscape, and use the machines in the tower, to make an island if you will and try to fight back. They lost, hard.
She managed to activate the crystal trap, but due to there not being enough world, or life forms in it, it backfired. As Chaos disolved the last of the world the energy from the crystals took her from her shard to ours and dropped her on the shore near the keeper of the lake. She has scars, most you can't see, but some you can given womens armor sometimes. She has ptsd, it is not totally crippling, but it does shut her down from time to time.
She has taken to living on our world, helping people out and doing her part to make sure our world stays in balance. She is somewhat withdrawn because she saw her world and almost everything in get unmade. She is not the stoic, never talks to anyone, dosen't like anyone kind of trope. If she gets to know you she is at least a bit more then civil. She is loyal to the world at large and uses her reptuation and her rank in the Adder to try and keep a balance of light and dark in the world. That is her main pourpose, keeping Chaos from finding her current world. She dosen't see good and evil really, and is unfortuneatly pragmactic to a fault. So she often suggests plans of action the Scions would find immoral. The path of least resistance as it were. It is results that matter, not the actions that lead to said results.
Now I have not started rping her at all. I am concentrating on getting her leveled and seeing all of the Stormblood story. I would like this to be her background and her premise when I start. I have tried to keep her from being troperific, and she certanly is not Mary Sueish because she got her ass handed to her and she did not turn into wonder woman with her flaws doubts and fears.