Yoichi Saotome/Relationships

Elder Sister
She commands Yoichi to hide under the bed when the vampires attack. Lacus Welt kills her. Gekkouin often makes an illusion of her when he tries to take possession of Yoichi's body.

Lieutenant Colonel Guren Ichinose
Guren experiments on Yoichi and makes him a bearer of the Black Demon Series. His words help Yoichi overcome his demon when he first makes a contract. Commander of the Moon Demon Company. From the prestigious Ichinose family.

Sergeant Shinoa Hīragi
The leader of Yoichi's squad. She enjoys pranking and teasing all of the members. She usually acts like she wants to protect Yoichi's innocence or blames him as the source of ideas for her pranks. From the prestigious Hiragi family.

Second Lieutenant Mitsuba Sangu
The second-in-command of their squad. She actually has experience in battle. She is close friends with Shinoa. She gets into fights with everyone except Yoichi. From the prestigious Sangu family.

Special Private Yūichirō Hyakuya
Possibly Yoichi's closest friend. Yoichi takes every reasonable opportunity to glomp him. Yu helps him when he gets bullied. They begin their training together.

Special Private Shihō Kimizuki
Kimizuki has cooking skills. He often gets in fights with the other two hot-headed members of their squad, and Yoichi often intervenes.

Major General Shinya Hiragi
He coaches Yoichi on sniping when they attack Fifteenth Progenitor Lacus Welt in Nagoya.

Mikaela Hyakuya
Yuichiro's family, who became a vampire.

Lacus Welt
The vampire who killed Yoichi's elder sister.

Gekkouin
Yoichi's demon. He often replays memories of when Yoichi's sister died at Lacus's fangs. Although he possesses Yoichi at first, they come to get along. They chat when Yoichi goes to sleep, even going so far as to discuss their favorite colors. Thanks to this, Yoichi masters manifestation without any help.