Hellen Gravely is a huge fan of King Boo. Sometime after the events of Luigi's Mansion: Dark Moon, she lures Professor E. Gadd to her hotel, then captures him and steals his ghost collection, including King Boo, who she releases.Hellen Gravely sends an invitation to Luigi, Mario, Princess Peach, and the Toads to come to her hotel for a vacation. Upon arriving, she wears sunglasses to hide her ghostly features, and welcomes them warmly, showing them to their rooms on the fifth floor.