Hilda Episode 6 - Chapter 6: The Nightmare Spirit Episode Title:Chapter 6: The Nightmare Spirit.Episode Description:David has been having nightmares, so Hilda and Frida try to find the source. They discover that David is being haunted by a nightmare spirit called a Marra. Late at night, Hilda, Alfur, and Frida set a trap for the Marra, and Hilda challenges Marra to scare her in exchange for leaving David alone. She lets Marra give her nightmares, but she is interrupted by David waking her up. The Marra leaves David alone saying that he is "not fun to haunt" anymore now that he is not as easy to scare.