The kingdom of Atziluth is a country in Zweite, the second continent, which is centered in Matriarchy. The highest position being the Empress, princess, and then, noblewoman. The empress of Atziluth has no king, only prince consorts—male royals who are the concubines of a reigning female sovereign; in this case, Leviticus' mother, Empress Diana of Atziluth.
And he, Prince Leviticus of Atziluth, is her only son.
Despite Empress Diana having a number of consorts, she only allowed herself to carry the child of a single man. He was the only person who was said to be the capturer of the queen's heart—a commoner that even the name was unknown to the inhabitants of the palace.