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Sensei (先生, Sensei) is the player's character and main protagonist of Blue Archive who serves as the advisor of SCHALE, and also an adult.

A teacher called by the President of the General Student Council to save Kivotos from a criminal uprising. From there, supported by Arona and the students of various academies, Sensei watches over Kivotos, solving problems, protecting the people, and getting into all sorts of (mis)adventures and wacky antics all the while.

Quick Answers

What role does Sensei play in the Blue Archive anime?

Sensei, the main character of the Blue Archive anime, serves as a teacher, SCHALE advisor, and federal investigator. Summoned by the President of the General Student Council, they work to protect Kivotos from criminal activities, with the aid of Arona and the students.

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Who are some of the students that Sensei supports in Blue Archive?

They support any students who request their help, often interacting with them in their respective clubs and guiding them through various activities. To name a few, Sunaookami Shiroko, Takanashi Hoshino, Kuromi Serika, Okusora Ayane, Izayoi Nonomi.

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What is the mission of Sensei in the Blue Archive game?

Sensei, a central character in the Blue Archive game, has a mission of addressing issues across Kivotos' schools. This involves guiding their students towards improved futures. The narrative unfolds through various missions and chapters, with Sensei being integral to each.

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How does Sensei contribute to the plot of Blue Archive?

Sensei, the main character in Blue Archive, is instrumental in shaping the story. Their adventures span across the Kivotos schools, where they resolve diverse issues and guide students towards improved futures. Their decisions and actions significantly influence the narrative's progression.

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What is the relationship between Sensei and Arona in Blue Archive?

In Blue Archive, Arona is a guide for Sensei during their Kivotos adventure. She offers assistance and protection via the Shittim Chest while also interacting with each other.

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Profile

Introduction

A teacher with a strange affinity for military tactics, they are the advisor of SCHALE, an extrajudicial organization under the purview of the General Student Council. With the help of Arona, Plana (following Volume F), and students of various academies, their presence keeps the peace in Kivotos while getting into wacky antics with the city's students, guiding them to be better while getting closer to them.

Personality

As Sensei's dialogue options are selected by the player, their personality varies considerately, be it childish or mature, oblivious or sharp, cunning or gullible. In general, Sensei seems to change their attitude to fit the students. As noted by Hayase Yuuka in her first relationship story, they have an unusual obsession with gacha games, robots and other childish obsessions, concurrent with giving nuggets of wisdom and being able to teach and encourage students. These changes only vary more with the player's dialogue choices. The only constants in personality are their dedication to safeguarding the well-being and happiness of their students, and their unusual affinity for combat tactics. Together, these allow Sensei to become a magnetic personality that attracts the students to them, with some students (e.g. Kosaka Wakamo) even developing romantic feelings for them.

Appearance

In-game, Sensei is the player's self-insert character, allowing the player to imagine their sex or any appearance they want for themselves.^[1]

Isakusan, the scenario director, specifies that Sensei is supposed to represent how the player wants to represent themselves as. That said, there is one notable interpretation of Sensei: Arona once depicted Sensei as a crude, caricature-like, childishly drawn smiling character on Yostar's Arona Channel series to joke about the inaccurate nature of GenAI images.

While the depiction is non-canon, it became popular throughout the fandom. Arona would officially use this depiction of Sensei when she baked cookies showing her and Sensei together holding hands; in that respect, we can say it is the only icon appeared in-game. Publishers seem to be using it conveniently, such as the SRT mini-game released for limited time, the TW-official hot dog shop collaboration, and graffiti on the JP-official images.

Isakusan also defines all external media depictions of Sensei as non-canon for the original game. As such, other platforms can depict Sensei freely. The infamous Problem Solver 68 Manga where Sensei is depicted as a handsome young man with short hair, glasses, a black undershirt, and a long white professors coat with a blue armband featuring SCHALE's emblem and a lanyard with a ID badge. In the Game Development Department's Manga, Sensei has a head similar to a portrait by Arona and a tremendous mass of muscle. In other manga anthologies, Sensei's gender, age, and appearance varies considerately.

In the 2024 anime adaptation, Sensei's appearance uses clothing that is common among white-collar office workers, with them wearing a gray suit with matching pants and a white long-sleeved polo shirt worn underneath, a black tie, and black shoes. Similarly, the facial expressions are reminiscent of the greatest common denominator faces that are often used in illustrations of government offices and public spaces in East Asia.

Weapons & Equipment

The "Adult Card" (大人のカード), also known as the "Credit Card" on Global, is their personal trump card. According to Maestro, it is a power obtained for the price of life and time, and is very alien that even the eldritch beings of Gematria require "meta-cognition" to comprehend it. Although the exact capability of the Adult Card is still unknown, it allows them to fight on a level even beyond the superhuman students of Kivotos. This is depicted in gameplay by allowing the player to use their own student lineup in a story episode battle instead of a pre-arranged story team. The card itself is a meta reference to gacha mechanics, especially for longtime, paying players. This type of players has likely built up a roster of powerful students by paying for gacha rolls and stamina refreshes to create a strong team, spending time and money and using a credit card to make the payment. Black Suit also mentioned that continuous abuse of the card can lead to a sort of corruption similar to what Gematria has gone through. Though what this actually means is still unclear, it can be said that this is a reference to the real-world analogy where people who abuse their credit cards too much wound up broke or in debt.

The Credit Card has been used five times in the story so far: the first time to defeat an incomplete version of Hieronymus during V3C3E24, the second time to rescue Mika during V3C4E25, the third to clear out mysterious enemies surrounding the District of Utnapishtim during VFC2E1, the fourth to battle Phrenapates during VFC4E6, and the fifth to defeat The Fury of Set during V1C3E39.

Another item Sensei has in their possession is the Shittim Chest (シッテムの箱), a mysterious tablet previously belonging to the GSC President before her disappearance. Within the device are the high-performance AIs Arona and later Plana, with the two greatly augmenting the processing power that the Shittim Chest is capable of. The chest also helps protect them from oncoming fire, although its power is finite.

Though unconfirmed, according to the teaser images, Sensei would be seen armed with a Beretta 92FS handgun, sporting the SCHALE insignia stamped on the grips. The pistol is likely for self-defense purposes although it is never used. (see Trivia).

Powers & Abilities

• Intellect: As a teacher, they are likely smarter than most characters in the game when it comes to certain aspects such as military tactics and serious topics like politics, things that most students would probably not understand as much unless they focus on those topics, and can easily teach multiple students. They are also able to provide various moral lessons that fit with the situation, such as the infamous quote: "If you believe that your bikini bottoms are panties, then they're panties.", which they said to Yurizono Seia. The quote itself means that "If you believe that something is right or important, so it is."

• Military Acumen: Being unarmed, Sensei doesn't directly engage in combat. However, they somehow possess military strategies and tactics, and are the one directing the students in combat, specifically shown by the player choosing who to deploy in combat, where they move in missions and when and where to activate the students' EX Skills. Their knowledge in tactics and commanding capabilities has allowed them to turn the tides in various disadvantageous battles.

• Extrajudicial Authority: They are able to perform certain duties and bypass procedures that would normally require interference from a school's student council or the General Student Council itself for the sake of the students. This allows enlistment of any student from any school to take part in missions, being able to act as club advisor, allowing immediate establishment of a club in a matter of hours and even standing in for the General Student Council President in absolute emergencies, as seen in V3C3E19.

• "Authority": Sensei seems to have a supernatural air of authority within Kivotos. Aside from the extrajudicial authority provided by SCHALE, certain areas and objects require their presence to open, such as the Shittim Chest and the Ruins during the Millennium Arc.

Weaknesses

• Bodily Harm: Lacking a halo, unlike Kivotos' student populace and other beings, they are significantly vulnerable to gunfire, as they can potentially die in one shot. A fitting example is during the Treaty of Eden (Volume 3), where Sensei was shot by Joumae Saori; despite Sorasaki Hina taking the bullet to protect them, the resulting shrapnel would cause serious injuries leading them to lose consciousness. This weakness is covered by the Shittim Chest's ability to protect them, should it be in close proximity and have enough power. Outside such cases, Sensei is vulnerable to harm. The protection it grants is also limited, as it cannot protect them from grave threats nor when the power runs out.

• Acrophobia (fear of heights): During the Rabbit of Caerbannog Arc, Sensei was part of Operation: Clover, an operation where the members of the RABBIT Platoon would infiltrate Valkyrie to retrieve evidence of Valkyrie's illegal collusion with the Kaiser Corporation. During the infiltration, RABBIT Platoon grappled down from a building, but Sensei didn't follow along with them. At the end of Where All Miracles Begin, having used the last evacuation protocol on Shiroko Terror to teleport her onto the surface, they would initially resign to their fate before asking Arona to rescue A.R.O.N.A from the Shittim Chest in her timeline, transferring her conscience onto the current-day Shittim Chest and saving them from what would otherwise be a fatal plunge to the surface.

One of the dialogue options during this situation mentioned that Sensei has a fear of heights. Additionally, in Otose Kotama's Relationship Stories Episode 1: Grown-Up Secrets, she tried to wiretap Schale's Executive Office but was caught by Sensei. Somewhere along the conversation, Sensei admitted that their weakness was being afraid of heights.

Trivia

• Although Sensei is never directly addressed as a male, there are a number of indirect references in the game that suggest that Sensei is a male, as in the following quote from Sorai Saki in her first Relationship story, when replying to Sensei's suggestion for her to do a handstand, "Why would you ask a female student wearing a skirt to do a handstand?". Other scenarios include them wounding up with the Gourmet Research Society in confinement in the club's Group Story.
  • In English-speaking circles, players often refer and describe Sensei as "he/him".
  • In Murokasa Akane's third Relationship story however, teachers can specify to be called an 'onii-chan' or 'onee-chan', the latter being the female equivalent of big brother in Japanese.^[2]
  • Regarding pronouns, Sensei is referred to as "they", adding to the ambiguity.
  • In the JP and original KR scripts, the situation is a little bit different. As a linguistic property of Japanese tones change blatantly depending on gender, but Sensei's aren't. Their first person pronoun is "watashi" (私), gender independent words that are used by both genders in formal settings, but have a neutral or slightly feminine impression in private spaces. Gender-specific tones are also avoided. This localization policy blurs gender even more than he/she's intentional avoidance.
  • A leaked draft concept artwork from Candy Box reveals that the anime adaptation originally intended to depict Sensei as female.^[3]
• Sensei's face isn't officially shown in-game, but Arona has made a drawing of their face as well as a gingerbread chocolate figure of them. At the very least, they are not bald.
  • Arona's Sensei drawing is also frequently used by the community. It's also appeared in a second of the TV anime's opening.^[4]
• As Volume 3 reveals, education in Kivotos is mostly done by Blu-Ray, with in-person teaching being restricted to guest lecturers and assistants. Thus, Sensei is possibly the only traditional dedicated teacher in the entirety of Kivotos.^[5]
  • In fact, Koyuki was surprised to meet a teacher for the first time when she met Sensei during the events of Bunny Chaser on Board.
• In an interview with the scenario writer, Isakusan, it's revealed that a "teacher" is a being that has completed their growth, or a complete being. What this fully entails is still unknown, but this contrasts Sensei with their "incomplete" students.
• Sensei's appearance in the Blue Archive Problem Solver 68 Business Diary manga has led some of the English-speaking fans to point out his loose resemblance to Sosuke Aizen, an antagonist from the Japanese manga series Bleach.
• Sensei's official appearance on "Blue Archive, The Animation", along with the key visual reveals prior to the premiere, has caused a sudden viral trend throughout most social medias as their gender is always an unanswered question, and their iconic "doodle" version is the only official one in the original game. This Sensei was also designed by DoReMi, who was thankful for being chosen for the project. This makes DoReMi the official artist for Sensei's Animation depiction.
• Although most official depictions of Sensei are not visibly armed, they would likely be owning a Beretta 92FS pistol as shown on the teaser image. This is likely their SCHALE issued firearm given the insignia stamped on the grips likely for self defense purposes. Despite that, they would not be seen carrying it around when near students.
  • This could also be for Sensei's sake since they would be less likely to be pointed at with a gun in case a firefight erupts. This is because armed women would often prioritize other armed assailants in a gunfight. And given their extreme vulnerability against conventional firearms, this is the likely reason why they are not seen carrying around a gun.
• Fanfiction stories (and to an extent, the officially-published Anthologies) usually don't use the "official" version of Sensei, as the role is usually held by either an original creation of the fanfiction's writer (in stories that exclusively center on Blue Archive) or a character from another media series (in stories of the crossover variety).

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