The Imprisoned Demon Sergeant who Died for his Country

The Imprisoned Demon Sergeant who Died for his Country (殉國 禁獄 鬼軍曹, Jyunkoku Kingoku Onigunshō) is one of the spirits that Yayoi had obtained with a mutual agreement.

Appearance
The Demon Sergeant's doll is designed to look like a Shiba Inu.

In his war form, the Demon Sergeant looks young, with short black hair and a built figure from his wars. He wears a uniform with the shirt cut open, showing his past scars and other injuries.

In his last two forms, the Demon Sergeant begins to age alongside his victims. His hair grows longer and thinner, and his figure becomes more frail to portray himself as weaker.

Personality
Though not seen in action, the Demon Sergeant is described as a kind person whom does not harm children and women. On the flip side, as seen in battle, the Demon Sergeant is very brutal and suicidal. He often wishes to pass on during battle and outside of battle. It can be assumed that whilst he was alive, he was very courageous and brave as a soldier.

Synopsis
After fighting for Japan in the war he returned and eventually died of old age, however instead of passing on he instead looked how he was in his prime, and was surrounded by the ghosts of the soldiers he fought. Unlike other ghosts he does not pass on when he runs out of energy and remains trapped in the mortal world tormented by the ghosts of the other soldiers. Yayoi enlisted his help promising to help him die.

Powers & Abilities
The Demon Sergeant begins with his swordplay, despite his slimmer build, he is shown to be very durable and nimble, being able to block all attacks from the Old F tunnel ghost and regenerate quickly.

He has several other weapons he draws in combat, including a short sword, a rifle, and a hand grenade. Each time he draws a new weapon his "prayer of debility" spreads with him as the center, anyone who is caught up in it becomes significantly weaker and begins suffering the pain of the wounds he got in war, this effect also affects him, leading him to get weaker and weaker over the course of the fight, which is intentional as he tries to make himself weak enough that his opponent can kill him.

Trivia

 * The Demon Sergeant is the first Graduate level ghost that Yayoi obtained that she didn't raise herself.