ideas for books

I wanted a cultist of the outer gods from the lovecraftian mithos in danmachi, now, i have NEVER played bloodborne, but from the small bits i have heard of it's lore it seemed like an interesting idea for a fic

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One idea i have is for when mc gets to orario, the blood moon apears next to the normal one(so there is no conflict with arthemis), the blood moon will be up in the sky be it day or be it night, i am unsure if i will let others beside the mc be capable of seeing it (maybe just let the gods see it?), mc will be the moon's presence's child. I don't know if mc will join a familia, or if they will get their falna from the moon's presence, mc will have an umbilical cord(mc's own, that was keept scince their birth) to speak with their outer god parent. Bell will most likely not exist, freya will be unable to see mc's soul and that will put them in freya's crosshairs, when she aproches mc as syr for the first time, mc will flat out tell her to quit trying to look into their soul as such a young goddess would not survive even glancing at it, that will of course make freya decide mc must be the professised odr