(Blue Exorcists) The spans of Satan & The immortal devil pixie

The two boys had a friend that was not human or demon in fact SHE was both human and demon most demons called her The immortal princess, The immortal devil pixie, purple shadow, Shapshifter or The mixed blood. She was not of there world but by the time she met the brothers she felt like in for so long she was happy.

There was one thing that lead her back to the two brothers and that was a promise she made with father Shiro.

What will happen when both Rin and Yukio find out that this girl was with them for a long time? Will they remember there feelings that they had for her? Or will they be crush by the power and history that she had hidden from them?

find out by reading I do not own Blue Exorcists just Amelia and the story contents.