Hi Lozic, thank you for playing the game, I'm glad you liked it.
This ghost is just an asset that can be purchased by anyone from a site calling as CgTrader. Phasmophobia has also used this ghost asset. So that's normal to think of the ghost from phasmophobia since the game has a very huge player base.
This ghost asset also fits well P.T style horror games.
Thank you for playing again.