Yoichi Saotome/Relationships

Tomoe Saotome
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. Yuu was the one who helped him when he got bullied, and was ordered alongside him to be Yamanaka's gang's errand boys. After Yoichi reveals about his past and his regrets of not being able to save his sister, Yuu hits him with a soda can and tells him that Yoichi's sister wouldn't want to be avenged; in addition to this, he states that a spoiled weakling like him would have no place in the army.

However, Yoichi helps him save a civilian girl when one of the vampires from the research facilities escape. When Yoichi finds out that Yuu is safe, he tearfully runs up to hug him (although he accidentally makes Yuu pass out). He and Shinoa are at his side when Yuu comes to.

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. Yuu convinces Yoichi to help him save Mika later on.

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.