PMTOK Horror AU (sequel): The Ice Siren, the Thunder Siren, and the Shapeshifter
They are respectively based and fill the roles of Beldam, Marilyn and Doopliss.
The Ice Siren and Thunder Siren are the Lantern’s older sisters. The Ice Siren is an old hag who remembers the times of King Vellumses,, and wields terrifying ice magic. The Thunder Siren is a quiet woman who can create lightning out of her hands. The Ice Siren’s abuse as the Thunder Siren simply stood by is the main reason why the Fire Siren became the Lantern.
The Shapeshifter is the main antagonist of Chapter 4. At first casting a curse on the neighboring village, he then steals Olly’s identity and face, locking him away in his castle. When Olivia tries to corner, he scares her away and taunts her about how her brother is forever lost. Olivia ends up enlisting the help of the one who would become the Lantern to save him. For some reason, the Ruby Star is in his possession.