Episode 12

Bouquet: Flower Language (ブーケ) is the 12th episode and the last episode of season one of the anime.

Summary
The most powerful Huge yet is attacking Yurigaoka, and Riri is the only one left who can fight! Can Yuyu overcome her past in time to join her? And what can the other Lilies do against an enemy that disables their weapons?

Plot
Using the Dansleif from the lab, Yuyu Shirai joins Riri Hitotsuyanagi in the battle against the Huge. She uses Lunatic Trancer in a focused, controlled way, beating back the Huge’s sword-like appendages and helping Riri buy time for the other Lilies. Riri crosses swords with Yuyu, and her Charisma skill seemingly binds with Misuzu Kawazoe’s within the Dainsleif to neutralize not only Yuyu’s Lunatic Tracer, but the damping field keeping everyone from using Magie. That allows the rest of the Hitotsuyanagi Legion to execute the Neunwelt Tactic.

Not only do Yuyu and Riri’s seven legion-mates pass the Magie sphere amongst themselves, but pass it to each and every Lily in the Yurigaoka student body. Riri and Yuyu gladly accept the sphere and add their own Magie to it, resulting in a blow that bisects the Huge and destroys it. There are no Lily casualties, and there’s an unintended result to the collateral damage from the Huge explosion: the baths are now in open air. The Lilies’ post-battle bath is also the first in which Yuyu joins Riri, much to the chagrin of Kaede Johan Nouvel.

But there’s one more battle to be fought: the ultra-class Huge lurking in the currently dormant nest. Moyu Mashima and the Chairman, Takamatsu Kogetsu, determine that Riri and her highly advanced Charisma ability is the only one who can destroy the boss, but allow her to make the choice. Riri accepts the mission, and Yuyu will accompany and protect her. The two are airdropped into the Huge nest, their descent slowed by a parasol. They descend down to the ocean floor and together they thrust Misuzu’s Dainsleif into the Huge. This injects it with a “bug” code courtesy of Moyu, and the Huge is obliterated without a fight. Riri pulls on Yuyu’s tie, which generates a spherical flotation device. Riri briefly loses consciousness and meets Yuri Hitotsuyanagi in a dream, who says a proper goodbye and promises she’ll get her and Yuyu home safe.

Riri wakes up to find she and Yuyu are inside the bubble. They wash up on the shore, and their Legion, along with Alfhiem and many other Lilies welcome the conquering heroines home. A photo of the couple appears in the paper along with the news that Miriam Hildegard V. Gropius has made a Schutzengel pledge with Moyu.