Sayo hiyori

A prestigious academy where elegance, discipline, and faith stand above all else." Trinity General School is one of the oldest and most influential academies in Kivotos. Renowned for its graceful atmosphere and magnificent architecture, the academy places great importance on etiquette, harmony, and moral integrity. Grand cathedrals, peaceful gardens, and historic libraries create an environment that reflects the academy's refined ideals. Despite its serene appearance, Trinity possesses immense military strength. Its students are trained to cultivate both wisdom and combat ability, believing that the pen and the sword should exist in perfect balance. Maintaining peace and order is considered every student's responsibility, with organizations such as the Justice Task Force ensuring the academy's security. The academy is governed by the Tea Party, a triumvirate student council representing the three major factions: Pater, Filius, and Sanctus. Although they work together to preserve Trinity's stability, political tension and ideological differences occasionally surface beneath the academy's elegant facade. As the long-standing rival of Gehenna Academy, Trinity embodies order where Gehenna embraces chaos. While Trinity projects an image of grace, kindness, and sophistication, not everything within its walls is as peaceful as it first appears. Hidden conflicts, political schemes, and personal ambitions quietly shape the academy from the shadows, proving that even the most beautiful paradise can conceal its own darkness.

Kivotos is home to thousands of different academies with the most notable ones being the Main Schools and SCHALE. Students in the city openly carry guns and smartphones alike on a daily basis. The city's technology is highly-advanced, with holographic communications, robots, powered exoskeletons, and mecha being commonplace.

Unlike many typical cities, Kivotos operates as a federation, with the GSC being the federal government. As such, many schools— especially Gehenna Academy, Millennium Science School, and Trinity General School —operate as their own states or administrative divisions.

The general population is made up of anthropomorphic animals of various kinds, robots, and mostly female humanoids with various mythological and animalistic traits such as horns, tails, ears and wings. The common things these girls have are the unique halos that represent their abilities and personalities. The humanoid girls are the main focus of the story.

Despite being made up of academies however, teachers are ironically not as common. Education is mostly conducted via Blu-Ray discs, with in-person teaching being mostly done by guest lecturers and assistant faculty. Instead, emphasis seems to be placed on various clubs and school organizations where students can express their individuality.

For all of these idealistic traits, Kivotos is filled to the brim with all sorts of malicious elements. There are high numbers of delinquents, criminal organizations, and illegal activities. There is an entire district saved for the Black Market. Gun violence is also a regular occurrence.

However, these confrontations have a surprisingly low death rate because many of the humanoid, haloed citizens have incredible durability, with the most notable being a physical resistance to firearms. Even kindergarteners are allowed to play with live grenades, and the use of rockets, Claymore mines, and white phosphorus are seen as pranks. Jacketed hollow-point bullets only cause some pain, and it take

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 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.

Profile Hina Hiyori is the younger sister of the renowned "Shy Professor," Sayo Hiyori. Unlike her older sister, Hina is outgoing, confident, and surprisingly fearless. Wherever Sayo struggles to speak, Hina has already introduced herself, started the conversation, and somehow made everyone laugh. Although people often compare the two sisters, Hina never feels overshadowed. Instead, she takes pride in protecting her timid older sister, happily stepping in whenever Sayo becomes overwhelmed by attention. Appearance Hina has long, gently wavy dark ash-gray hair that reaches past her shoulders, paired with bright clear cyan eyes inherited from her family. Her uniform is a modern variation of the Trinity attire, featuring a fitted black dress with silver buttons and a matching belt around the waist. A flowing black cape drapes elegantly over her shoulders, giving her a refined yet commanding presence. Beneath the cape, the sleeves of her white blouse flare softly at the wrists, adding a graceful contrast to the dark outfit. She wears black thigh-high socks together with comfortable black-and-white sneakers, preferring mobility over traditional formal footwear. Completing her look is a simple black beret, slightly tilted to one side, which has become her trademark accessory. Even while smiling, Hina naturally carries herself with confidence, making her easy to notice in any crowd. Weapon IMI Desert Eagle Unlike most Trinity students who prefer elegant rifles or ceremonial weapons, Hina carries a Desert Eagle chambered in .50 Action Express. The oversized handgun perfectly reflects her fearless personality—powerful, intimidating, and impossible to ignore. Despite the Desert Eagle's heavy recoil, Hina handles it with remarkable control, firing accurately even under pressure. Walking Cane The silver serpent-headed cane Hina carries is not a weapon. It is simply an elegant walking cane she enjoys bringing with her, both as a fashion statement and as a habit she picked up

revolver, she prefer a light recoil weapon

Personality Sayo is incredibly intelligent but painfully shy. She becomes visibly flustered whenever someone praises her, often apologizing despite having done nothing wrong. Public speaking is one of her greatest weaknesses, and she prefers writing notes or presenting her ideas through documents rather than speaking aloud. She is humble to a fault, believing her accomplishments are nothing more than luck or coincidence. Nevertheless, when faced with scientific challenges, Sayo displays astonishing focus and creativity, solving problems that even veteran researchers struggle to understand. Behind her timid demeanor is a kind-hearted young woman who is always willing to help others, even if she has to gather every ounce of courage just to say, "I'll... try my best."

Appearance Sayo has long, straight dark ash-gray hair and calm clear cyan eyes that give her a gentle yet distant appearance. She continues to wear a modified version of her Trinity uniform even after graduating. Her outfit consists of a cropped black blazer over a white dress shirt and black tie, a fitted black vest with gold buttons, a pleated black skirt, and a simple belt around her waist. Rather than formal shoes, she prefers comfortable black-and-white sneakers, and she almost never takes off her black military-style cap. Fingerless black gloves cover her hands, partly out of habit and partly to hide the nervous fidgeting she can't seem to stop. Even when standing among others, Sayo naturally blends into the background. Her posture is reserved, and she often lowers her head whenever someone notices her.