The alternated fan OC is based on 'The Blue Fairy' from Pinocchio(from illustrations to different kinds of movies)  and 'Granmamare' from Ponyo. 

'Evangeline' is not human. Perhaps truly monstrously an angel. Even though she wishes to be mortal, claiming the title of 'The Blue Fairy' given by mortals' narrative, her form is ever-changing. 

They lived by the duty as an Overseer, the Wishing Star that connected the world of reality and fiction alike. Granting wishes to all whose desire reaches those who hold the pen beyond her veil. 

Despite being all-powerful and all-knowing, what comes in the stories below her-- even if she tries to give all happy endings-- it's futile. Many curse her, many abandon her once proven wishes can not be, and even at times take advantage of her kindness when given grace. Eons after eons of the same cycle, she was giving up until--

Until a singular, gaining-consciousness soul started to form in the realm of fiction —Human? No, Firefly? What is...? 

Perhaps finally she can have her own happy ending. [She's his, "La belle Evangeline"]

 She is ethereally poised, warm, wise, and unpredictable. There are some whispers from Hades that when 'Evangeline' is angered a slight-- be very VERY cautious. "That 'person' is waaaaaay worse than ME. or, even "Mal-ie" there. Yeeesh. That's why I refer to them, behind their back,  as a Spartan- Ro... Oh, that's my underworld about to be torn apart, gotta leave. TAA!!"