Having seen where Menou came from and who trained her, it’s entirely possible her bonhomie is merely a carefully practiced act. Hell, even her sense of style, which Akari admires, was developed as one more arrow in her executioner’s quiver. But gosh darn it all if she and Akari have the most adorable date in Garm on the eve of Akari’s ethering.
I honestly didn’t know why so much attention was spent on Menou delegating her investigation mission to Momo, but now we know: because as Menou skips around town with Akari, Momo is scouring Garm’s massive underground tunnel network. There, she not only finds forbidden Faust tech under the Noblesse royal palace, she also finds Ashuna, who is conducting an investigation of her own.
Ashuna and Momo’s dynamic continues to get better and better, especially here where they don’t take up arms against each other but simply co-exist as two people with a shared goal: uncovering the truth, whatever it is. Meanwhile, the absolute truth that Menou feels nothing for Akari starts to show its cracks the closer they get to zero hour in the creepily white ceremonial hall.
As the apparent magecraft to eliminate Akari starts up, Menou’s scripture lights up, indicating a call from Momo. Momo, along with Ashuna, have already discovered that there are Faust conspiring with the Noblesse for some dark purpose. Menou is just a little too late to realize it, for Orwell is right beside her when she does, and she can tell Menou’s figured out she’s doin’ some dirt.
So no sooner does Menou know than Orwell knows she knows, and after that, Menou finds herself in a hopelessly lopsided battle against the Archbishop of the Faust. Her most powerful attack is leisurely swatted away by Orwell, who then unleashes a terrifying counterattack that destroys Menou’s book. She tosses it at Orwell like a bomb, but ends up falling through the hole Orwell makes below her, leaving Akari on her own against eight priestesses.
Orwell follows Menou to the space below the hall, where Menou finds all of the missing women who have literally had the life and vitality sucked out of them. Orwell’s face game is epic, as she gives her bad guy speech about how she’s sick of helping people and wants something in return: her youth back. She’s planning on using Akari’s Pure Concept to make that happen, and was willing to conspire with the Noblesse to do so.
The scripture-less Menou is probably already toast in a one-on-one battle with Orwell, but Orewell still decides to make it interesting by summoning a red automa in angel form to do her dirty work. It’s not just Akari she wants for her Pure Concept, but Menou she wants as a catalyst, revealing she’s played the long game for ten years.
The title of the episode is “Goodbye”, but it’s not about Menou saying goodbye to Akari. It’s about her saying goodbye to the righteous life she thought she was living. With Orwell not just turning heel, but having been a heel all along, the bottom has dropped out from Menou’s world. She and Akari are down, but they’re not out…not as long as Momo and Ashuna are still out and about.