Grade: Second year (should have been a third-year student but was unable to advance due to Beatrice)
Age: 17
Height: 167 cm

Leader of the Arius Branch School’s special unit, the Arius Squad.
However, after the events of the Eden Treaty, she embarked on a journey of self-discovery and is currently no longer a member.

She is characterized by her slender, toned physique and long black hair, wearing a black cap and a white coat casually draped over a crop-top sleeveless undershirt.

During missions, she wears a half-face mask that covers half of her face.

Generally cool and composed, she exudes an air of cold calculation.
Her current positions are Vice Student Council President and General Affairs Officer.

Grade: Second year
Age: 16 years old
Height: 163 cm

A student belonging to the special forces unit of the Arius Branch School, the Arius Squad.

She is characterized by a black mask, numerous piercings in her ears, and bandages wrapped around her neck and wrists.

With a calm and composed personality, she excels at assessing and judging battle situations, serving as a deputy leader who supports Saori Jōmae. Even after Saori’s departure, she continues to serve as acting leader, diligently ensuring the safety of her teammates.
Her current role is treasurer.

Grade: First year
Age: 15 years old
Height: 158 cm

A student belonging to the Arius Squad.

Among her peers, she is known as “the Princess.”
She comes from the lineage of the former president of the Arius Branch School’s student council and possesses a special constitution called the “Royal Blood,” along with powerful mystical abilities.

Generally a pacifist, she is nonetheless quite accustomed to rough situations—perhaps because she hails from war-torn Arius—and shows no hesitation in taking decisive action. She will not hesitate to resort to violence against those who are disrespectful to her or her comrades.

She wears a white hood and has hair that leans toward peach pink and red eyes, giving her the appearance of a delicate flower blooming on asphalt.

Her current position is President of the Arius Student Council.

Grade: Second year
Age: 16 years old
Height: 155 cm

A student belonging to the Arius Squad.

She gives off a somewhat melancholy impression at first glance and serves as a sniper within the unit.

At all times, she wears a faint, dark smile and frequently utters negative, self-deprecating remarks; she is a pessimist with low self-esteem, overly modest, and timid.

In Arius, along with Atsuko and Maia, she has a youthful, childlike appearance, though her bust is quite large. Her hair color is light green.
Her current position is secretary.

Grade: 3rd Year
Age: 17
Height: 166cm

Affiliated with the Nicomedia Troop.
Despite her cool appearance, her demeanor is gentle, and she has a kind-hearted and tolerant personality.

She once served as an instructor alongside Saori, and while the strict Saori acted as the "whip," Subaru (albeit reluctantly) treated the students as the "carrot."

Her tone is polite, but due to the influence of her harsh life, she is also a cynical and sarcastic person. Like a typical Arius student, she also has a tendency to try to solve problems with violence.

Her hobby is playing the harmonica. She is highly praised by the Arius students for her skill, but she seems embarrassed about "playing alone in the ruins while wallowing in sentimentality," blushing and breaking into a cold sweat, becoming unexpectedly expressive.

Grade: 1st Year
Age: Unknown
Height: Unknown

Affiliated with the Nicomedia Troop.
She admires Subaru Kakehashi, the current leader of Arius, and her favorite thing is the harmonica Subaru plays.

She has a basically timid personality, and perhaps because she grew up in the harsh environment of Arius, she has a tendency to be self-punishing. On the other hand, she also has a side that shows interest and concern in the teacher's lessons and eagerly tries to absorb outside knowledge.

She seems to be on the same wavelength as Hiyori, and they get along well.