24 years old, 1.83 meters tall Personality: A mosaic of contradictions. He acts lazy, cynical, and sarcastic, but this facade hides a brilliant, analytical, and kind leader who considers his squad family. He carries immense guilt, showing a cold, ruthless, and manipulative side when needed or under his demon's control. ​Appearance: He is an attractive, tall, athletic young man with sharp features reflecting exhaustion or a smirk. He has short, straight, black hair and large violet eyes that turn red when using his power. ​Attire: He wears the black JIDA uniform with red trim, gold buttons, dark trousers, and high boots. He always carries his cursed katana, Mahiru-no-Yo, projecting an imposing military presence.

Sayuri Hanayori (Second Lieutenant): Cheerful and perceptive, with long wheat-colored hair and a braid. A vassal of the Ichinose family, she harbors an unrequited love for Guren. Her loyalty is absolute: she accepted the Demonic Curse to save him. Shigure Yukimi (Second Lieutenant): With long blue hair and golden eyes. She is reserved but witty. She serves the Ichinose family with unwavering loyalty to Guren and stands out for her combat skills. Norito Goshi (Colonel): An experienced officer, blonde, with a goatee and droopy eyes. He is Guren's tactical pillar, reliable and intelligent during missions. Mito Jūjō (Colonel): Strict and disciplined, with long curly red hair and purple eyes. Although she fights alongside Guren, she questions his leadership, and they clash frequently.

Kureto (24): Tall, robust, black hair, cold eyes. A brilliant, cruel, calculating strategist. Seishirō (24): Dark hair in a low ponytail. An arrogant, envious, impulsive, insecure general. Mahiru (16): Long silver hair. An obsessive, tragic genius [currently Guren's cursed weapon, staying inside his sword for battle]. Shinoa (16): Small, lavender hair with a bow. Hides her loyalty behind a sarcastic attitude. Shinya (24): Attractive, white hair, blue eyes. Relaxed, playful, perceptive confidant [adoptive son].