Okay, but a ghost darling would be the pettiest being ever towards alive Yan. Moving things out of place, writting mean things in the walls. Alive Yan is just glad that ghost darling is paying atenttion to them.
Oof that would suck, honestly the place I'm living at right now is low-key kinda haunted
I can just imagine yandere being some normal, albeit supeeeeer lonely guy who just moved in to a new place
Ghost darling who's already gone through the whole yandere-is-stalking-me thing when the were alive immediately senses something off about the guy and tries to get them to leave
The Yandere being the sad delusional mess he is mistakes ghost darling attempts to spook him as them trying to get their attention.
Cue an increasingly annoyed ghost try harder to spook them off and an increasingly obsessed yandere deflected them by pure stupidity.