I am issuing a challenged for a crossover between Bloodborne and Kuroinu: Kedakaki Seijo wa Hakudaku ni Somaru:

It need be after the ending of the Anime.

The Hunter must be a female and have the Ascended ending in Bloodborne.

The Hunter must have an apathetic personality, but demonstrate her good intentions to actions.

Her weapons are the Burial Blade and the firearms are the choice of the author.

She must have listened to a prayer for salvation to start the story, since the Great Ones are sympathetic in spirit.

The Hunter can summon a Paleblood Moon to increase her powers, the effects felted by the humans and the effects on the Hunter after it use are leaved to the imagination of the author.

The Hunter have her Great One powers greatly reduced, while she is on the "waking world", but she can be insanely powerful in the Hunters Dream, and she can instate madness on humans by the merely touch if she wishes.

Companions are optional.

The Hunter have sexual interaction is leaved to the author choice.

Yharnam must have existed and felled in the Legends.

The rest of the story is leaved to the imagination of the author.