Comments of chapter undefined of Prince of Crows

this is probably going to sound stupid but who is Seraphina? I've been looking for anyone of that name and i can't find anything, and it's driving me crazy. who is she? where is she from? is she an OC if yes who did you base her off of? what does she look like? what powers does she have? what impact will her existence have on the story? is she cannon? i have so many questions!!!

TFTC