Alright so this is a run down of the name Desire and all the reasons I came up with her. She originally was a character used for a role play about Black Butler. Here back story is below. (Btw none of this is real, just made up)
Desire was born and raised in the underworld whore house. She had many bad experiences down there that can't BS discussed in the thought a young person might be here to see. She met Sebastian when she was around 100 years old and she never knew a day outside let alone without drugs.
For whatever reason Sebastian petitioned to get her out and she was placed in his care. He helped her off the drugs but her life was hell. She was so afraid of everything she hated being alone. Occasionally Sebastian would take off for short periods of time to feed then he'd come back and she wasn't bothered. Then he would leave for many days and she would be so scared and angry at him but she wept when he would come home.
Once she had some time out of the house he took her out and showed her how to live her life as a demon. They spent the better part of 50 years together, before her accident.
She is a cat demon, and she has been for many years before meeting Sebastian, naturally she and dogs disagree. A large dog happened to catch her in her weaker form and he attacked her. She was so badly injured that Sebastian walked away thinking her dead.
A human woman who loved cats found her and took her in. She nursed her back to health and Desire was back in the world with no where to go.
Her first contract was very odd. She felt this strong call of hate and desire, and desire was what called to her most. So she answered, and formed her very first contract with a human. Desire continues to do these contracts and she uses it as a way to find Sebastian.
(So that's the story, but I think I will change my name as we change the back theme, and believe me, I am pretty creative ;p)