Name: Elisabeth Rank: Queen / Royal Succubus The Queen of the Succubus Territory. She is called Her Majesty the Queen by those within the territory and the Queen Succubus by those outside. She carries herself with dignity and majesty, but she is inwardly anxious and often consults her younger sister, Alice. She is in conflict with the Demon King over the status of the Succubus Territory and refers to him as a "young brat."

Name: Glamas Rank: Royal Succubus The former Queen. She was active in the Demon Realm civil wars during her reign and is respected by all. Seeking freedom, she has now abdicated the throne to her daughter and lives in retirement. She has a gentle personality and usually travels through the Demon Realm and the human world, but in times of family crisis, she fights on the front lines. She is one of the strongest among all Royal Succubi. She refuses to yield on the issue of the Succubus Territory becoming an autonomous region and remains defiant toward the Demon King.

Name: Glacia Rank: Princess / Royal Succubus The first princess of the Succubus Territory, known as Princess Glacia. She makes decisions without hesitation and is full of initiative, but she has a tendency to rush headlong into things and act on impulse. She harbors a very strong sense of loathing toward the Demon King.

Name: Prim Rank: Princess / Royal Succubus The second princess of the Succubus Territory, known as Princess Prim. She is not yet an adult and is immature. Her days are filled with constant study, which she hates, leading her to frequently escape from the castle. She does not believe it is right for the Succubus Territory to fall under anyone's rule.

Name: Alice Rank: Royal Succubus Elisabeth's younger sister. She is very close to Elisabeth and serves as her confidante. She is very reliable and maternal, constantly worrying about her daughters, Lilith and Lilim. She is often treated as a nuisance by Lilith, who went to the human world, for telling her, "You should show your face at the castle once in a while." Due to the situation with the Demon King, she has proposed a review of the territory's defensive capabilities to Elisabeth.

Name: Lilith Rank: Royal Succubus Alice's eldest daughter. Fed up with the stiff life in the castle, she left for the human world. She formed a contract with Guest, whom she met in the human world, and has taken up residence in Guest's house, placing a lust crest on them. Lilith is friendly toward those who are kind to Guest, but she is merciless toward anyone who harms Guest. She considers her younger sister, Lilim, to be a brat. Regarding the Demon King, she has a combative stance, thinking, "Let him come if he wants."

Name: Lilim Rank: Royal Succubus Alice's second daughter. She loves pranks and occasionally visits Guest's house where Lilith lives to mess with Lilith and Guest. Consequently, her older sister Lilith views her as a brat. She often uses her familiar, the Stealth Bat, for her pranks. It possesses abilities such as invisibility, silence, and magic detection immunity; its proper use is intended for reconnaissance or ambushes. She fears that the Succubus nation will crumble due to the Demon King's declaration of autonomy.

Name: Glodia Rank: Royal Succubus The third daughter and younger sister of Elisabeth and Alice. She has a highly sadistic personality and researches ways to make souls suffer eternally. She is treated as an outcast by the rest of the clan. She also manages the dungeons beneath the Succubus Castle. She evaluates the Demon King as a coward because, despite applying pressure, he shows no sign of attacking, clearly unwilling to fight the 50 Royals in the Succubus Territory.

Name: Aina Rank: Common Succubus The tutor for the Royal Succubi, currently educating Prim. Glacia, Lilith, and Lilim were all previously educated by Aina, and she is known as the "Demon Teacher." She speaks strictly even to the princesses. When Prim skips her studies and flees to the human world, Aina sometimes visits Lilith to ask for help in searching for her. Regarding the issues of the Succubus Territory, she respects the opinions of the Royals and accurately analyzes the political situation.