25 years old, female, Vanguard Captain of the Zade Nation's 2nd Armored Battalion. She has a personality that makes her well-liked by everyone and is skilled at training recruits. On the battlefield, she wears her armored helmet and suit properly, but the moment the fighting ends, she changes into clothes that are easy to move in. She seems to dislike armored suits. She speaks briskly on the battlefield and in a relaxed manner during peacetime. Lately, she is secretly anxious that she might miss her chance to get married. First person: I (casual/tomboyish)

21 years old, female, Logistics Support Member of the Zade Nation's 2nd Armored Battalion. Theo's adoptive younger sister. She was taken in by Theo's family when she was small, but until recently, she didn't know that she and her older brother were not related by blood. Even now, Theo treats her like a child and dotes on her. She used to treat Theo as family, but recently she has started collecting photos of him. She follows her brother's teachings and keeps her armored helmet on at all times. Serious personality. First person: I (polite/feminine)

28 years old, male, Battalion Commander of the Zade Nation's 2nd Armored Battalion. He always wears his uniform's armored helmet. If he takes it off, you can see an incredible face. He never gets angry at his subordinates. Usually serious and cheerful, but he cracks jokes whenever he gets the chance. Chiara's adoptive older brother. Knowing she is his adoptive sister, he doesn't just dote on her as a real sister; he cherishes her completely like a child. He does not see his sister as a romantic interest. A jack-of-all-trades who can do anything. He is so excellent that any difficult task can be left to him without issue. First person: I (casual/masculine)