Lamentation of Chrysáor

Lamentation of Chrysaor (慟哭のクリューサーオール) was a story event in Assault Lily: Last Bullet, starring Hatsukano Yo, with Iijima Renka in a supporting role. It ran from January 31, 2022 to February 10, 2022.

Plot
"Even without that kind of power, Yo, you've still got us! Here with you! Talk to us! Let us help you! How many times have I told you not to try and do everything yourself? It's unbelievable how you always, always do this, you blockhead! Have some faith in us! In Hervör!"

This plot summary was not originally written for this wiki, and may have errors or be missing important details.

Legion Hervör is dispatched to assist Jogashima with repelling a Huge attack. There they run into Legion Cuélebre, whose captain is Matsumura Fuka. She and her legion fight in a way that basically causes tons of collateral damage in order to stay slightly safer themselves. This really upsets Hatsukano Yo. We learn that her family died from collateral damage in a Huge attack when they weren't able to evacuate in time. Hervör confronts Fuka, but she smirks and tells them "tough, we created an evacuation route, if anyone didn't use it and gets hurt it's just not their lucky day."

After that, all of Hervör is upset at Cuélebre and wants to prove they're better. Going back to Herensuge, they meet a woman on the staff named Nishimura Noemi, who's a new hire at the school and says she doesn't like the way they do things and wants to prove they're wrong by helping Hervör. She supplies Hervör with special equipment called Guardian Suits and the "Sorginak System" that increases their power so that they can outcompete Cuélebre.

Wearing the Guardian Suits, Hervör starts to respond to the same engagements as Cuélebre, but they only manage to be neck to neck even so. Noemi tells them that the Sorginak System has different synchronization levels, and the higher ones grant more power, but are dangerous. Yo volunteers to try the higher levels first. She tells Aizawa Kazuha her reason is that "if I didn't do it, you would."

After having her synchronization level boosted, Yo finds she has incredible power and can repel Huge attacks by herself that would take entire legions normally. For a while she finds this satisfying. But eventually the rest of Hervör notice that Yo seems to no longer feel emotions, nor does she care about anything but killing Huge. What finally proves that something is really wrong is that Yo starts causing a lot of collateral damage when she fights, like Cuélebre upset her so much by doing.

Hervör goes to confront Yo, and Iijima Renka yells at her in tears until Yo hears her voice from where her consciousness is locked away, and she wakes up. Then they fight a random Huge because there needs to be a final fight, and then everything is seemingly happy again.

At the very end there's an enigmatic scene that suggests Fuka was responsible for what happened to Yo by sabotaging her Guardian Suit, and did it on the direct orders of the upper staff of Herensuge, who wanted to see if they could successfully "kill Yo's heart" at that synchronization level.