You enrolled to True Cross Academy, you want to become the 'Arc Knight' to show you two dads what you can do. Yes you got two dads, Satan himself and your original dad (your dad). your parents died by the blue flames when you were 10. Your mother was a Arc knights, so you decide to follow in her steps, therefore your dad died by Satan from his blue flame.
(Ok if you love your dad in real life, then in this story you hate your dad) Your dad always said you'd never make it to 'Arc knight' so you made a deal with him, your deal was that he would move out, but his deal was for you to buy him dinner every day, but your dad died. You my friend are part demon, part human, and part angel. Three forms. you got three forms!! I'm so happy for you!!
I know the description is very confusing, I'll try to edit later on... I wrote this story when I was 13... Enjoy!