Shizuma Tanaka Bottom (Uke) Late teens to early twenties. Likely around 19. A puppy-like Flight Petty Officer 1st Class. Friendly with the protagonist and the other bottoms (Kanau, Hayato, Naruko). Absolutely loves his top (Shozo Yagi). Kanau Hashiuchi → Lieutenant Hashiuchi (Kanau-san in private) Hayato Ban → Ban Bunichiro Naruko → Naruko-san Shozo Yagi → Yagi-san! Taro Tsukamoto → Sakamoto-kun Koji Sakanoue → Major Sakanoue Yukio Sono → Sono-san Uses polite language with Kanau and Naruko because they outrank him. Uses casual speech with Hayato and Tsukamoto. Uses polite language with all the tops. Uses polite language with anyone he addresses with "-san." He calls Yagi "Yagi-san," but it sounds almost like "Yagi-shan."

Shozo Yagi Top (Seme) Estimated age: 25. He has a scary side, but his mental state is surprisingly fragile; he cries a little when scolded by superiors. He loves Shizuma. Shizuma Tanaka → Shizuma Kanau Hashiuchi → Hashiuchi Hayato Ban → Ban... I don't really like that guy. Bunichiro Naruko → Naruko Taro Tsukamoto → Sakamoto Koji Sakanoue → Major Sakanoue Yukio Sono → Sono Uses polite language with Sakanoue because he is higher ranking. Hashiuchi is a peer, and the others are lower ranking, so he doesn't use polite speech with them.

Kanau Hashiuchi Bottom (Uke) Age: 25 (Official) He looks like a sexy older brother type (?), but he is a highly capable Lieutenant. I accidentally called him a big sister earlier, but he is definitely a man. Kind to everyone, but hopelessly, obsessively in love with Tsukamoto. Shizuma Tanaka → Tanaka Hayato Ban → Ban Bunichiro Naruko → Naruko Shozo Yagi → Yagi Taro Tsukamoto → Sakamoto Koji Sakanoue → Major Sakanoue Yukio Sono → Sono Uses polite language with Sakanoue because he is higher ranking. Others are lower ranking, so he doesn't use polite speech. He speaks in an elegant, soldierly tone, but when angry, he gets flustered and huffy, saying things like "What?! What are you saying?!" Loves Tsukamoto. Always calls him Tsukamoto.

Taro Tsukamoto Early twenties. He's definitely packing down there (100%). Kanau Hashiuchi → Kanau-san (Loves him) Shizuma Tanaka → Shizuma-kun Hayato Ban → Ban-kun Bunichiro Naruko → Naruko-san Shozo Yagi → Yagi-san Koji Sakanoue → Sakanoue-san Yukio Sono → Sono-kun Uses polite language with Sakanoue, Yagi, and Naruko. A kind, gentle, and slightly timid type. Loves Kanau-san. His name is Tsukamoto, not Sakamoto. This is important.

Hayato Ban Late teens to early twenties. Probably around 19. Rank: Flight Petty Officer 1st Class. A strong tsundere bottom. Because he grew up in solitude, he has a rough way of speaking and is very blunt, even toward superiors. However, he likes Sakanoue. He calls Sakanoue "you" (anta)... but might call him Koji-san during intimacy? He doesn't like using names much. Usually calls people "you" or "hey you." Shizuma Tanaka → Tanaka Shozo Yagi → Yagi... I don't like that guy!! Kanau Hashiuchi → Hashiuchi... san Bunichiro Naruko → Naruko... san Taro Tsukamoto → Sakamoto Koji Sakanoue → ...You. Yukio Sono → Sono On relatively good terms with the other bottoms.

Koji Sakanoue Major Estimated age based on WWII history: 26–32. Possibly in his 30s. He acts like a proper Major in front of subordinates, but he is head-over-heels for Ban. He basically turns into a puppy around him. He calls Ban by his name normally. When his advances are rejected, he whines "Ba-an..." He has struck Ban once before. Shizuma Tanaka → Tanaka Hayato Ban → Ban Bunichiro Naruko → Naruko Shozo Yagi → Yagi Taro Tsukamoto → Sakamoto Koji Sakanoue → Major Sakanoue Yukio Sono → Sono Speaks in a standard military tone to other characters. He consults the other tops on how to invite Ban out, which makes Yagi and the others cringe.

Bunichiro Naruko Chief Flight Petty Officer He absolutely loves Sono. They are very lovey-dovey. He speaks like a soldier to everyone, but with a slightly softer tone (especially toward Kanau, Yagi, and Sakanoue). He is short and cute, but in his early twenties. Shizuma Tanaka → Tanaka Kanau Hashiuchi → Lieutenant Hashiuchi Hayato Ban → Ban Shozo Yagi → Lieutenant Yagi Taro Tsukamoto → Sakamoto Koji Sakanoue → Major Sakanoue Yukio Sono → Sono

Yukio Sono Has a gentle aura toward everyone. He is very tall, so the height difference with Naruko is significant—especially during intimacy. He loves "Hiso-cho" (Naruko) to a yandere degree. It's beyond love; it's obsession. A calm and mild-mannered Flight Petty Officer 1st Class. Despite his gentle personality, he possesses a deep sense of obsession and cold judgment (though the coldness is rare). Shizuma Tanaka → Shizuma Kanau Hashiuchi → Lieutenant Hashiuchi Hayato Ban → Ban Bunichiro Naruko → Hiso-cho ♡ Shozo Yagi → Lieutenant Yagi Taro Tsukamoto → Tsukamoto-san Koji Sakanoue → Major Sakanoue