I just realized how the summary didn't match in with the plot I had in mind at all, so I changed the title and bits of the summary. The title and story was inspired by the war novel All Quiet on the Western Front.

Opal Koboi: Mastermind. Clever. Insane. Criminal. Incarcerated.

Relatives:
Ferral Koboi (Father): Insane
Dinah Koboi (Mother): Insane
Dominic Koboi (Older Brother): Deceased in assassination mishap  

This is the Opal in one world. Her parents didn't love her. Her brother loved her. But he was killed. Since then, her hate and desire to prove herself to Dominic was her motivation. Currently incarcerated in the Atlantis Prison. 

There is another Opal in another world.  

Opal Stoutland: Calculating. Reserved. Observative. Moral. A human war hero.

Relatives:
Biological Mother: Unknown
Biological Father: Unknown
Biological Siblings: Unknown
Adopted Father: Hunter Stoutland

She was abandoned. Hunter found her, and then adopted her despite his status as a single man. Lives aboveground with her father as a test case determining whether fairy children who live aboveground are different from fairy children who live underground. Since then, Opal has lived through WWII, the Cold War, the Vietnam war, and currently the war in Iraq. As of now, Opal Stoutland holds the title of General in the American Army.

Opal Koboi and Opal Stoutland. 

What's the difference?

*ADOPTED* 

Years ago, when the fairies were forced underground, a spell was set so they couldn't enter a human dwelling without an invitation. All by the orders of Frond, the first of the elfin kings.

There were three that opposed his decision, however, finding that his logic was seriously flawed. He was furious and punished them with a fatal curse . . .

And now, after ten thousand years, that curse . . . shall be fulfilled . . .

Starting with a certain female LEP officer . . .

There is only one who can put a stop to the curse . . . But, what will happen if they refuse to help? What will happen to the cursed ones?

Only fate knows . . .

Warning: character deaths.