Bloodborne: Bloody Crow of Cainhurst cheese (AI leash) (Patch 1.09)

Lure him below the stairs near the door and he may de-aggro and attempt to return home. Attacking NPC hunters in this state will not cause them to re-aggro. Other easy ways to kill this NPC are via poison and allowing him to deplete his own health in Chikage transformed mode. He will only heal once.