In an episode that opens with Chise sharing a bed with Elias, these two splitting up would have been at the absolute bottom of things I expected to happen. But with her condition deteriorating and the meeting with the witches ending up almost completely fruitless, Elias decides to take Chise’s life out of her own hands, for what he believes to be her own sake…as well as his own happiness. Before they part ways, Mariel reminds Elias that only life can pay for life.
Elias has always been called “half-assed” or a “monster” but Chise was the first and only one who would “look at just me.” Well, thanks to his actions this week, she may never look at him that way, or any other way, ever again.
Just as she relays her suspicions Elias and Ruth are up to something behind her back and asks for Ariel to back her up, Elias knocks Chise out. She guides herself out of the dream with an image of Nevin, telling her that whatever others have planned for her, all she can do is be clear on what she needs to do.
With that, Chise breaks out of the dream by stabbing herself in the leg and does what must be done: stop Elias and/or Ruth from sacrificing anyone to save her. When she finds Elias has brought Stella into the house to be the sacrifice, Chise is, understandably, furious.
Even worse is when Elias tries to explain himself: not liking how Chise looked at Stella (i.e. their friendship), and not being able to stand it, and stating as long as Chise can continue to live he’ll be happy. After urging Stella to run away, she punches Elias in the face and storms out.
Of course, what Chise didn’t know is that Stella had already been possessed by Joseph, AKA Cartiphilus, who only pretended to be Stella in distress. But it doesn’t matter; Stella or Cartiphilus-possessing-Stella, Elias sought to transfer Chise’s curse to them. That makes Elias no different in Chise’s eyes anymore. He is a monster after all.
But here’s the thing: human beings are perfectly capable of becoming monsters, or doing monstrous things, if they feel there are no other options. If anything, Elias taking the steps he did were simultaneously appallingly naive and contemptuous of Chise’s wishes, and just plain wrong, but incredibly human nonetheless.
Chise isn’t the kind of human to put her life or welfare before anyone else’s. Cartiphilus knows this, and also knows how angry Chise is by Elia’s betrayal. So he offers her Stella’s life and a spell that will save her own, in exchange for her cooperation. And Chise accepts without hesitation, teleporting away with Carty and leaving her necklace behind.