doppelganger \DAH-pul-gang-ur\

(noun)
1 : a ghostly counterpart of a living person
2 a : alter ego b : a living person who has the same name as or who closely resembles another living person

생령(生靈)(wraith) ((본인에게만 보이는))

Example sentence:
In Dostoyevsky’s novel _The Double_, a clerk named Golyadkin is driven to madness by unrequited love and by his doppelganger, a wraith that succeeds everywhere he himself has
failed.