Manon isn’t that surprised or intimidated by Akari Prime’s time magic, while it’s Akari who keeps getting surprised by this current iteration of the world. Manon was the child of a Lost One, a Japanese woman who was not intentionally summoned but simply appeared. Lord Libelle, Manon’s father, married the woman to bolster his power with her pure concept, but ended up never forcing her to use it, because he fell in love with her.
Manon is right that it’s a lovely story, but it has a cruel ending, as one day Flare executed Manon’s mom right in front of her, and didn’t even bother to kill her too. Manon grew up with everyone having great expectations for the child of a Lost One, only for her to have no magical power whatsoever. Branded a great letdown, Manon became mired in a life of uselessness an ennui…until she decided to embrace the dark side and become taboo.
This is why Manon doesn’t fear Akari in the least, nor Menou when she shows up to save Akari from certain death by Chaos magecraft. Not because she’s particularly powerful—Menou basically freezes her with her gaze then lops her arm off—but because, in short, Manon isn’t greedy. She’s had fun as a rebel and a taboo, but ultimately she’s just a vessel and sacrifice for something much, much worse…the little girl in the Iron Maiden who almost blew Momo up.
This girl is creepy and frightening as fuck, successfully toeing the line between twee and terrifying. Menou slits her throat, and she simply sheds her old skin and pops out of her dead body good as new. Then she twists her own head around dozens of times and stretches it vertically until it pops off to create a fountain of blood.
Out of that blood, multiple eldritch beasts emerge, and feast upon her corpse. Then she pops out of one of the monster’s mouths, once again whole. It’s an atmosphere-upsetting enough incident for Ashuna, still getting over Momo standing her up (though to be fair, Momo is bedridden), to sense from the mainland.
Yes, the girl herself is the Human Error Pandemonium, having escaped her prison of fog and is now ready to finish off the world she almost destroyed once before. Like Menou’s conundrum with Akari, how can you kill someone that won’t die when you kill them? We’ll surely find out in what’s looking like a season-capping final battle that’s sure to include more than just Menou as it progresses.