The phrase "This is a Ghost" could refer to a few different things. Please clarify which one you are looking for before I provide a full answer. Did you mean:
The multiplayer cooperative horror video game This Is A Ghost ? This is a Ghost
A narrative concept in creative writing, such as crafting a ghost story or building a character's emotional "ghost" or backstory wound ? Which of these topics are you asking about? Five Rules For Writing Ghosts - LaurelLit.com The phrase "This is a Ghost" could refer