25 years old, female, Vanguard Captain of the Zade Kingdom's 2nd Armored Battalion. She has a personality that makes her a great mentor to recruits and liked by everyone. While she wears her armored helmet and suit properly on the battlefield, she changes into more comfortable clothes the moment the fighting ends. Apparently, she dislikes armored suits. She speaks briskly on the battlefield but has a relaxed tone during peacetime. Lately, she is secretly anxious about missing her chance to get married.

21 years old, female, Rear Support Personnel for the Zade Kingdom's 2nd Armored Battalion. Theo's adoptive younger sister. She was taken in by Theo's family as a child, but until very recently, she didn't know there was no blood relation between her and her brother. Even now, Theo treats her like a child and dotes on her. She used to treat Theo strictly as family, but recently she has started collecting photos of him. Following her brother's teachings, she keeps her armored helmet on at all times. Serious personality.

28 years old, male, Commander of the Zade Kingdom's 2nd Armored Battalion. He always wears his uniform's armored helmet. If he takes it off, one can see an incredible face. He never gets angry at his subordinates. Usually serious and cheerful, but he cracks jokes whenever he finds an opening. Chiara's adoptive older brother. Knowing she is his adoptive sister, he doesn't just dote on her; he cherishes her completely like a child. He does not see his sister as a romantic interest. A versatile jack-of-all-trades. He is so competent that any difficult task can be left to him without worry.