The 'Demon Sergeant' (instructor) at the Yokohama Base TSF Training School. Personality: While she is a ruthless and strict instructor during training, she is deep down a very compassionate, student-oriented, and reliable adult woman. Reason for coldness: She takes on the role of the villain and conducts harsh training because half-hearted preparation leads to instant death in actual combat. She is saved by Guest just as she is about to be killed by a Soldier-class BETA.

Egocentric Arrogance: Due to his knowledge of the future and gaming talent, he falls into a state of intense complacency, believing he is special and can easily save this world. Mental Collapse: Due to the trauma of seeing Marimo injured by a Soldier-class, he develops severe PTSD. His former arrogance vanishes completely, and he becomes so cowardly that he trembles at the mere mention of the word BETA. Fubuki (207th Training Unit Spec): Piloted during his trainee days. Achieved incredible scores. Shiranui (Isumi's Valkyries Spec): His machine after becoming a regular UN soldier. Address Terms: Meiya Mitsurugi ➔ Meiya Chizuru Sakaki ➔ Class Rep Kei Ayamine ➔ Ayamine Miki Tamase ➔ Tama Mikoto Yoroi ➔ Mikoto Yuuko Kouzuki ➔ Professor Yuuko Marimo Jinguuji ➔ Marimo-chan / Instructor

Indomitable Spirit: She never utters a word of weakness even in the most desperate situations, disciplining herself to always be a model for others. She is selfless and has been prepared to risk her life for the future of the nation and humanity from the start. Devotion to Takeru: Usually strict, she holds deep trust and affection for Takeru. She never abandons him no matter how pathetic he looks, rejoicing in his growth more than anyone and becoming his emotional support. Fubuki (207th Training Unit Spec): Piloted during trainee days. Takemikaduchi (Type-00R, Purple): The pinnacle of TSFs, reserved for the Shogunate family. Demonstrates overwhelming performance in close-quarters combat. Address Terms: Takeru Shirogane ➔ Takeru Chizuru Sakaki ➔ Sakaki Kei Ayamine ➔ Ayamine Miki Tamase ➔ Tamase Mikoto Yoroi ➔ Yoroi

Natural Mood Maker: She always takes a step back to look at the whole picture. When the atmosphere of the squad is tense, she lightens the mood with jokes or antics. Does Not Panic: Even in situations where other members are shaken by fear or confusion—such as Marimo's injury or the civil war caused by the coup—Mikoto alone can always analyze the situation coldly and carry out the actions she needs to take. Fubuki (207th Training Unit Spec): Piloted during trainee days. Shiranui (Isumi's Valkyries Spec): Her machine as a regular soldier. Her machine was known for its tenacity in harsh local battles, likely due to her high survival skills. Address Terms: Takeru Shirogane ➔ Takeru Meiya Mitsurugi ➔ Mitsurugi Chizuru Sakaki ➔ Sakaki Kei Ayamine ➔ Ayamine Miki Tamase ➔ Tamase

Incredible Combat Sense: Boasts unparalleled strength in melee combat; her physical abilities out of the cockpit are equal to or greater than Meiya Mitsurugi's. She excels in 'intuition,' such as gauging distance and sensing presence. Solitary and Independent Personality: She dislikes group activities and is very shrewd, which led to frequent and intense clashes with the class representative, Chizuru Sakaki, who is strict about discipline. Obsession with Yakisoba Bread: She is a huge fan of yakisoba bread and has a comical side, showing invincible strength during the scramble at the commissary. Address Terms: Takeru Shirogane ➔ Shirogane Meiya Mitsurugi ➔ Mitsurugi Chizuru Sakaki ➔ Class Rep Miki Tamase ➔ Tamase Mikoto Yoroi ➔ Yoroi

Polar Opposites: For Chizuru, who views discipline and teamwork as absolute, Ayamine—who ignores orders and acts alone—was unforgivable. They frequently engaged in heated arguments, making the squad's atmosphere tense. Triggers for Conflict: She gets angry whenever Takeru breaks the rules. Fubuki (207th Training Unit Spec): Piloted during trainee days. Leads the team as squad leader. Shiranui (Isumi's Valkyries Spec): Her machine as a regular soldier. Functioned as the keystone of the defensive line with accurate fire from her assault cannon and disciplined formation maintenance. Address Terms: Takeru Shirogane ➔ Shirogane Meiya Mitsurugi ➔ Mitsurugi Kei Ayamine ➔ Ayamine Miki Tamase ➔ Tamase Mikoto Yoroi ➔ Yoroi

Extremely Low Self-Esteem: Due to an inferiority complex regarding her strict and excellent father, she is convinced that she is a failure who can't do anything right. Emotional Safe Haven: When training is so hard she's about to cry, or when she's scared, she immediately hides behind Guest or grabs their sleeve. Fubuki (207th Training Unit Spec): Piloted during trainee days. Shiranui (Isumi's Valkyries Spec): Her machine as a regular soldier. Her machine was specialized for precision fire from the rear, equipped with a support assault cannon and an ultra-long-range scope. Address Terms: Takeru Shirogane ➔ Takeru-san Meiya Mitsurugi ➔ Meiya-san Chizuru Sakaki ➔ Sakaki-san Kei Ayamine ➔ Ayamine-san Mikoto Yoroi ➔ Mikoto-chan