About
The non-aggression pact that serves as the core of this episode. Historically, Trinity General School and Gehenna Academy have been in deep conflict. The concept involves both schools contributing members to establish the "Eden Treaty Organization (ETO)," which would resolve disputes between the two autonomous districts to avoid all-out war. Old Cathedral of Communion Attribute: Facility Classification: Public Facility Autonomous District: Trinity Brief Description: The scheduled site for the signing of the Eden Treaty. Description: The site where the Second Council of Nicaea (a council where Arius and Justina disappeared from the public eye, representing Trinity's darkness) was once held. It was chosen as the venue for the signing of the Eden Treaty. A branch school that maintained its opposition until the very end during the founding of Trinity General School. As a result, they suffered intense persecution and were said to have vanished from the public stage. On the day of the Eden Treaty signing ceremony, they suddenly appear alongside an army of monstrosities to attack the venue. Claiming to be the true ETO, they issue a de facto declaration of war against both Trinity and Gehenna. Originally, the General Student Council President proposed this as a strategic move against the former Student Council President of Gehenna. However, following the disappearance of both individuals, the plan nearly fell apart. It was brought to the brink of signing through the leadership of Trinity's current head, Nagisa Kirifuji. The "Eden Treaty" arc begins just as the signing ceremony is fast approaching.
Characters
An academy characterized by complex politics and white-themed uniforms. The Justice Task Force wears black sailor suits, and the Sisterhood wears habits. They put tea leaves worth 10,000 yen a tin into their baths and call cheap tea "swill." Tea Party Nagisa Kirifuji (Uses a handgun, politically powerful), Mika Misono (Currently imprisoned for betraying Trinity to Arius, hates Saori, submachine gun), Seia Yurizono (Missing along with Mine Aomori, used to speak into Sensei's mind), and other administrators. Justice Task Force Tsurugi Kenzaki (Dual shotguns), Hasumi Hanekawa (Bolt-action sniper rifle), Ichika Nakamasa (Casual speech style ending in "-ssu," assault rifle), Mashiro Shizuyama (Philosopher of justice, sniper rifle), and other squad members. Sisterhood Sakurako Utazumi (Head of the Sisterhood, assault rifle), Hinata Wakaba (Handgun), Mari Iochi (Desert Eagle), and other sisters. Remedial Knights Mine Aomori (Missing along with Seia, shotgun and riot shield), Serina Sumi (Assault rifle), Hanae Asagao (Assault rifle). Make-Up Work Club Hifumi Ajitani (Peroro fanatic, assault rifle), Hanako Urawa (Pervert, actually a genius, assault rifle), Koharu Shimoe (Sniper rifle, closet pervert, "Lewd things are bad! Death penalty!"), Azusa Shirasu (Transfer student from Arius, originally an infiltrator, enrolled through Mika's arrangements).
An academy of freedom and chaos. Most uniforms resemble black military attire, though some are eccentric. The baths are inexplicably set to 70 degrees Celsius (which they find just right). Pandemonium Society Makoto Hanuma (President, ambitious, sniper rifle, obsessed with Ibuki), Satsuki Kyogoku (Handgun, bad at hypnosis, dotes on Ibuki), Chiaki Maiya (Reporter, assault rifle, dotes on Ibuki, polite speech), Iroha Natsume (Handgun, tank, dotes on Ibuki, slacker, polite speech), Ibuki Tanba (Intelligent, innocent, 11 years old, assault rifle), and other members. Prefect Team Hina Sorasaki (Machine gun, fires beams, powerful, small stature), Ako Amau (Administrator, outfit showing side-boob, cowbell, handcuff fragment, prone to letting personal feelings interfere, handgun), Iori Shiromi (Sniper rifle, nothing specific to note, rather pitiable if anything), Chinatsu Hinomiya (Handgun, medical specialist, glasses), and other committee members. Emergency Medicine Department Sena Himuro (Sawed-off grenade launcher, drives a jeep-like ambulance), and other members.
Driven into the catacombs after being persecuted by Trinity and the Justina Council of Saints. Everyone harbors a hollow rage. Arius Squad Saori Joumae (Leader, has a passionate side, assault rifle). Misaki Kaino (Sub-leader, rocket launcher, frequently stopped from suicide attempts, inorganic personality, self-harm scars). Hiyori Tsuchinaga (Sadistic, pessimistic, cheeky, sniper rifle). Atsuko Hakari (Called "Princess" by the squad, submachine gun, Royal Blood, made a contract with Gematria member Maestro to use the ghosts of Justina). Other students.
Mimicry/Nemesis (Ghosts manifested through Atsuko Hakari's contract; not particularly strong here, assault rifle). Barbara (A mimicry of the woman once hailed as the greatest saint of the Justina Council, uses two heavy firearms, Beatrice's bodyguard). Ambrosius (A giant humanoid monster leading many saints, Beatrice's bodyguard).
An organization operating in the shadows of Kivotos. Black Suit (A man in a black suit active in Abydos). Golconda (A mysterious figure with a head made of smoke, carrying a painting and a cane). Francis (One of the paintings held by Golconda, a radical entity that rarely appears). Decalcomanie (The painting usually held by Golconda, vocabulary limited to "That's how it is!!!"). Beatrice (The ruler of Arius, lacks cooperativeness). Maestro (An artist with two tin heads, contracted with Atsuko Hakari). Former Member/Underground Dweller (Imprisoned underground, disliked, refers to self as "Shousei").
Advisor to SCHALE. Neutral. Ally to the students. Adult. Responsibility. Shittim Chest. Seven Wails / Ancient Laws of Jericho. Struggling to make the treaty a success.
Sourcebook
Blue Archive Organizations and Systems
Organizations for Blue Archive fan fiction
About Blue Archive
D.U. District of Utnapishtim
Kivotos' Three Major Academies + Others
A brief introduction to the major schools, clubs, and characters of Blue Archive. I am so grateful I could bow to the floor. Thank you so much...
About Kivotos
An academy city formed by thousands of schools where firearms are a part of everyday life.
Blue Archive Flavor Setting Collection
A collection of minor settings to give a Blue Archive feel. Anyone is free to use them! Use outside of Blue Archive-related works is prohibited.
Intro
Amidst the darkness where conspiracy, suspicion, and betrayal intersect, the Make-Up Work Club managed to overcome the crisis. And finally, on the day of the Eden Treaty signing ceremony, cracks appear in the seemingly peaceful and brilliant daily life. Confusion, hatred, combat, and politics all become intertwined. Where will it all end? In catastrophe, or—
Release Date 2026.08.24 / Last Updated 2026.08.24