Saitō/Relationships

Mahiru Hīragi
A teenage girl born from the Hīragi family. She joins the Hyakuya Sect to oppose them. He tells her to becomes vampire but refuses to turn her himself and helps her but keeps his own objectives a secret.

Mikaela Hyakuya
A young seraph with high experimental potential. He acts as a leader toward the other orphans and is considered to be charming. He is half-Russian with blond hair and blue eyes. Saitō gives him money to buy ice cream. His mother was a member of the Hyakuya Sect and gravely injured him by throwing him out of a moving vehicle. His parents died during the subsequent car crash.

Vampires take him in the night of the Apocalypse along with the other orphans. Four years later, he tries to escape but is fatally wounded by Ferid Bathory. Krul Tepes saves his life by turning him into a vampire.

Yūichirō Hyakuya
A young seraph who Saitō picks up after his mother attempts to burn him alive in their apartment and then lights herself on fire and commits suicide. His father was also abusive. Saitō takes him to the same orphanage as Mika a few minutes before the Apocalypse begins, and Yu fights him the whole way. Vampires take him in the night of the Apocalypse along with the other orphans. Four years later, he attempts to escape with his family but is the sole survivor aside from Mika, who becomes a vampire. He is picked up by Guren Ichinose and is subjected to further experimentation.

Guren Ichinose
The heir to the Ichinose family and one who opposes the Hīragi. Saitō encounters him multiple times after a weak attempt to assassinate him, repeatedly offering an alliance persistently.

1st Progenitor
The First Progenitor was the one who turned Saito into a vampire. According to Saito, he disregarded almost everyone in the vampire race except for Ashera Tepes, because he was bored and wasn't interested in them anymore.

Ferid Bathory
Saito turned Ferid into a vampire. He disregarded Ferid because he didn't act according to his exceptions.

Crowley Eusford
Crowley was turned into a vampire using Saito's blood. It is unknown if Saito is aware that Crowley is sired from him.