Shunzen Tachihara

He was the unnamed older brother of Michizō Tachihara, who was a soldier during the Great War.

Appearance
He has short dark brown spiky hair. During the battle, he wears the typical military uniform consisting of military clothing, a hat and boots. He also wears a dog tag. He has two white patches on his face, one on the left side of his forehead and the other one on his lower-left chin.

Personality
He always wears a calm expression and gives off a quiet aura.

Ability
As what seems to appear, he can produce things made of metal from between the pages of a book. He created Yosano's hairpin which the latter still wears.

In an interview from 2019 Harukawa 35 called the Tachihara brothers' abilities "exactly the same," implying his ability is more similar to Michizou's than it appeared in our brief glimpse of its use.

History
He is approached by Yosano while reading a poetry collection, to which the latter says that if he is all better, he should go back to the battle. The soldier gives his thanks to Yosano for healing him and presents her a gift. He then reveals about the skill doctrine and being it the reason why Mori brought her at the battle. Mori was not happy that the solider read his "Immortal Regiment" treatise. Confused, Yosano asks about the Immortal Regiment and the upper brass. However, she was dragged by Mori telling her that there are more casualties needing her ability.

Together with the other soldiers, he continued to fought in the battle and got attacked. Upon waking up, he saw Yosano and asked about the condition of others. Yosano, tired and traumatized, asked how did she become an angel, since it's like she's just healing them for them to be killed again. The Soldier pulls out of what seem to be a and tells her that he keeps tally of everytime she saves him and thanks her for being there with them. He was then called by another soldier to get back to the battle.

He continued to fought in the battle - eventually getting injured again. Yosano saw his condition and tells that she doesn't want to save him. However, she was forced by Mori to heal him by shooting him. Eventually, he relays a message through a to Yosano in and describes her as an angel of death who controls the battlefield. He then relays his message to tell his family goodbye. Yosano rushes to the room and sees the soldier dead with his dog tag and a note that says "You are too correct", denouncing her.

Quotes

 * (to Akiko Yosano) "I'm keeping count of the times you saved my life. This time makes exactly five. I like this character and its meaning - correct. Everytime you complete a tally, you add one more "correct" thing to the world. This shows how correct you are. Without you, I'd never see my parents and brother back home again. I'm glad you're here for us."

Trivia

 * Harukawa's original character design for The Soldier was more physically fit, but Asagiri requested she make him look "like a good guy Fyodor."
 * Michizou Tachihara's real life older brother's name was Ichiro Tachihara. Ichiro died at the age of 3 the year before Michizou was born.