The last time Lily Rabe was a regular character in Ryan Murphy's "American Horror Story", she was a hippie with the Stevie Nicks record in the anthology's third season. It seems that there will be more of her to see in "Hotel", as reported by Entertainment Weekly.

Although to be clear, she did appear in a flashback as her "Asylum" character, Sister Mary Eunice in last season's "Freak Show."

What's new for Rabe this season, however, is that she will be playing a villain - a famous serial killer, so she says.

Rabe told The Wrap, "I've never played any villain on the show. So perhaps there's going to be an element on bad, bad girl."

With Rabe playing what seems to be a real-life figure, fans, according to the Huffington Post, are already digging for clues as to her character.

Among the more famous theories is that Rabe may play Lavinia Fisher, who may be the first serial killer in America. Fisher and her husband, John, were said to run the Six Mile House, believed to be a hotel or hideout for criminals and outlaws outside Charleston, South Carolina.

Last year, Murphy dabbled with another scary myth, Edward Mordrake, so it is possible that we could be looking forward to a real myth in "Hotel" as well.

Rabe won't be the only good-girl-gone bad in the new installment, though. The International Business Times reported that AHS veteran Sarah Paulson will be an anti-hero as well.

At Comic Con, she revealed that her character's name will be Sally Hypodermic.

Murphy then revealed that because none of Paulson's characters in the horror anthology had the chance to meet their demise yet, there is a big possibility that her villainous character will be killed off in "Hotel."

At the Comic-Con panel, creator Ryan Murphy confirmed that this will be a big season and the anthology will connect more and more as new and former AHS characters are confirmed to check in the hotel.

Along with Rabe and Paulson, "Hotel" will feature Evan Peters, Kathy Bates, Matt Bomer, Angela Bassett, Finn Wittrock, Chloe Sevigny, Denis O'Hare, Cheyenne Jackson, and Wes Bentley. Newcomers Lady Gaga and Max Greenfield are also expected to appear.

However, E! News said a major player will not be appearing in the next season ,although Murphy did hint of Jessica Lange's return for season 6.

Do you have any other theories as to who Rabe's famous serial killer will be?