Dark, noir-style mystery where the protagonist is literally a "Client" of the afterlife.
A famous ghost in Indonesian/Malay mythology often depicted as a woman with long hair (sometimes confused with "Klient" phonetically). Klient Koid Ghost
If you were looking for a about a character named Klient Koid who is a ghost, here is a short conceptual summary: Dark, noir-style mystery where the protagonist is literally