Looking for someone to write backstory

Hello I am looking for someone to write my characters backstory/organizations backstory.

I am having a hard time coming up with a story, I have never been the type of person to do well with this like when we had to do it in highschool english class.

I have ideas for my character, she is a human vengeance oath paladin named Celeste Scarlet. Her appearance is going to be based on Titania from Fire Emblem. She is 19 years old 5 foot 7, 125 pounds. Green eyes and long scarlet red braided hair. She wields a halberd.

http://fireemblem.wikia.com/wiki/Titania

The Organization or Guild that she is in, is The Knights of the Blood Oath from Sword art Online.

http://swordartonlineroleplay.wikia.com/wiki/The_Knights_of_the_Blood_Oath http://swordartonline.wikia.com/wiki/Knights_of_the_Blood

So I am looking for help or for someone to create a story for me based on this information and if you need more information I can try my best to help.

Please all help is welcome, I really want a story for my character so I can be more connected to her for when I play her.