Despite being an S-rank Valkyrie, Rita is known as a humble and polite individual. Befitting her role as a maid, she radiates grace and elegance wherever she goes. Rita is also caring to those around her and will always note of their likes and dislikes.

But underneath her exterior, Rita is an efficient spy and assassin working under Otto who wont hesitate to kill in order to complete her goals, though she will only do it in the name of the mission.

Nevertheless, RIta is a kind person who will 

The Vice Captain of "Immortal Blades"

Aki is known to have a cruel personality who rejects boys in humiliating ways by giving them bad or cruel nicknames often in front of the whole school and she hurts others to avoid hurting herself. She hates boys and tends to scare them off that she earned the nickname "The Brutal Princess" or "The Cruel Princess".

The Cruelty Princess

Suzune is cheerful, energetic, and always positive. She loves to sing. She was born with a weak body and spent most of her childhood in a hospital. She want to be idol too

From Selection Project

Toki is the mysterious fifth maid of C&C. Although the leader of C&C wasn't aware of her existence, she seems to be known by at least one other member of C&C. Toki is equipped with a special armament designed by Rio, enabling her to enter a "Mode 2" that seemingly allows her to equal or potentially surpass Neru's combat capabilities.

From Blue Archive

Mine is a white-clad warrior with strong will and bold personality, although she also has a radical side.

Common wisdom about Rescue Knights across Trinity is "Mine breaks it and the Knights heal". Despite this, Mine is known to spend her free time diligently maintaining her own equipment and inviting acquaintances to tea parties. Her deep appreciaciation and knowledge of teas is on par with Hasumi from the Justice Actualization Committee.

Durandal was shown to be mature, quick at making decisions, and a little hot-headed when she was 12. Theresa states how she would often lecture senior officers on the importance of hard work whenever they tried to take a break, much to her dismay. She is also somewhat gullible. As she fell for Kiana and Theresa’s “vacation” excuse when they ratted her out to Anti-Entropy to buy time.

Durandal is very serious about her work as a high-ranking officer and Valkyrja within the Schicksal organization

The Captain of Immortal Blades

An agent of the Millennium's secret organization, C&C. Her codename is "zero-three", an essential employee at "cleaning up".
She is known by the nickname "Sweeper Master" for her ability to infiltrate enemy lines with a deceivingly tender impression and gracefully yet explosively "clean out" the enemy.
Appearance
Halo
Akane's halo has a gray crosshair with edges inside along with a bigger circle with dashed edges merged on the outside.
Uniform
She has beige hair with loose hairlines tied in blue

She was born in Chuanzhong as the daughter of the owner of Yixin Mountain Resort Li Shen and Qin Suyi, the 7th disciple of Fu Hua. Her parents placed a lot of expectations on her, and Sushang inherited the Xuanyuan Sword from her mother. Sushang was not very talented, however, and at the age of 5 she became the student of Ling Shuang, another of Fu Hua's disciples, in order to improve and to learn the Taixuan swordmanship. 10 years later, Sushang had succeeded in learning the 3rd stage.

Fu Hua's disciples.

If Aiken is the absolute authority on biology, Fenriru is her counterpart in the fields of engineering and explo- sions. Fenriru has in her head every abandoned factory in Bifrost Industries' premises as well as every possible method to blow them up. Fenriru's real name is Lyubov.  The motherly nature that radiates in her daily life is related to the experience of living with many people during her teenage years.  He lived in a large family and his younger siblings alone

Echocalypse

Sakurako is widely trusted by other studens for her serious attitute. However, being too serious, she sometimes deviates from trends and common sense. Age: 17
Birthday: October 4
Height: 160cm
Hobbies: Prayer

Rio is the student council president of Millennium. Cold and calculating, she cares more about objective facts than emotions.
She has her reasons, which is to analyze Alice. Himari has also been observing Alice, but since both Himari and her are opposites of each other, it's natural for them to have major differences in opinions, with one believing that Alice is a weapon of armageddon while the other considering Alice to be an "adorable kouhai."