Here’s a crack theory on the author. The actor who plays the Author/Isaac said in a tweet he couldn’t give out the character’s last name because it would be too big of a spoiler. The only place that we’ve ever seen or heard the last name de Vil is on the front plate of the car which belonged to the author not Cruella. They never said Cruella’s and her mother’s the last name’s in the epidode “Sympathy for the de Vil” and if you think about it the only person you really feel sorry for in the episode is the Author. The Author it seems fell in love with Cruella, and she in her sick way, probably felt the same – keeping the car, the jewels & his last name, but hating him for taking away her ability to kill (remember there’s a very fine line between love & hate) but still showing love by using his last name. IF the author is Isaac de Vil – it would make him the “DeVil” tampering with fate versus the Sorcerer (“God”) and if you add Emma (“Savior”) plus Lily (“AntiSavior”) – you have an EPIC battle in the making.