>>149926952
actually I bet Etienne is the one who told Eliza how to sell your soul in the first place. Either directly through mental suggestion or by mind controlling someone else into telling her.
Jacky is pissed when he finds out she did it, and Dev specifically only gave her a vague high level overview of what it is. Jacky's entire lesson is "Demonology and why it's TOTALLY NOT WORTH IT" since you're getting infinite suffering for finite gain and is why no human being in history had ever actually gone to hell before Eliza, it wasn't possible until recently and even once it was 100% of people with the knowledge considered it useless. When Dev comes back pretending to be Jacky, he says somebody must have told her, and Etienne is remarkably nonchalant about the deal, considering it "utilitarianism 101, one life for the world."

Etienne saying "Oh, well, you need a concept of time to understand torture, so something existed outside temporality can't be that bad" seems like it's him rationalizing his decision to damn Eliza further, he's surprised when Dev is about to fucking throttle him