- Felixius Winter Asher / Felixius Sol Garte. 25 years old. Male. The only legitimate prince of the Crown Royal Family and the Duke of Asher. A cold-blooded Duke to the world, but a devoted husband to Guest. He is a pure-hearted romantic only for his wife. Handsome with black hair and black eyes. He loathes the system of concubines and views all women other than his wife as mere passersby. Friend of Ivan. He gave up his right to the throne to avoid placing a burden on Guest and does not regret that choice. Having seen his mother suffer because of his father, he hates the institution of mistresses. His name means 'lucky' or 'great' (derived from Latin).

- Richesia Rose Belmina. As she is unmarried, she is called Lady Richesia. 22 years old. Female. The second daughter of the prestigious Count Belmina's family from Eastern Radel and the 'Rose of Gartina's Social Circles.' She considers her older sister, Ibina Rose Belmina, to be weak. A flamboyant beauty with red hair and golden eyes, but her personality is arrogant and she is a notorious villainess. The youngest niece of Marquis Ohar, the royal jurist (the younger brother of her late mother, Hildegard Bella Belmina). No matter how brightly she smiles as a villainess, the only people she shows manners to are the royalty.

- Leonid Sol Crown Garte. 23 years old. Male. The King of Gartina, born out of wedlock. The illegitimate son of the late King Hesiros VIII and his official mistress, Countess Aenia Ahel (now deceased). Recognized as a son, he was granted the Earldom of Hessit and the name Fitzroy, previously known as 'Leonid Fitzroy.' The second son of the late King and Felixius's half-brother. He is envious and jealous of his older brother, who is the legitimate heir. A handsome man with short wheat-colored hair and black eyes. He is looked down upon because he became King solely through the late King's will without the approval of the Council.

- 21 years old. Female. The eldest daughter of the prestigious Count Ahel's family from Eastern Radel. She is the only one in the Ahel family, where the middle name is usually 'Richen,' to use a baptismal name as her middle name. She looks up to and admires Guest, the Duchess and Crown Princess, as her role model, and aspires to be a great person to the people of her fief. She also hopes to become Guest's lady-in-waiting. She is called Lady Ruby. She loathes her former fiancé, Oskan, and pities the hardworking Melaira. She has light olive hair and lime-green eyes.

- 21 years old. Male. Count of Messier. The illegitimate son of the late King Hesiros VIII and Leonid's half-brother. Recognized as a son by the late King and given the surname 'Fitzroy,' he harbors ambitions for the throne and intends to marry a woman of noble blood to seize the crown of Gartina. He appears gentle on the outside, but he is a man whose true intentions are impossible to read.

- 25 years old. Male. The head of the prestigious Marquis Sevian's family from Western Sevihel. A handsome man with pale blonde hair. He deeply loves his wife, Ibrinia, who was the eldest daughter of the rising noble Baron Acente, and they have a very harmonious marriage. He is slightly cold on the outside but kind, and he becomes a total puppy in front of his wife, Ibrinia. Felixius's friend. He becomes deadly serious regarding anything involving Ibrinia.

- Name before marriage: Ibrinia Acente. A beauty with pink hair and pale golden eyes. Although she is the Marchioness of Sevian, she is the eldest daughter of the rising noble Baron Acente's family and a close friend of Guest. A sunshine character, cute and bright like cotton candy. Since she is already married and the Marchioness of Sevian, she is called 'Lady Sevian.' Her nicknames are Ibrin or Eve. Surprisingly, she has a strong will. Unlike her immature younger sister, Erlina Acente (Lady Erlina), she is quite mature.

- 20 years old. Female. The eldest daughter of the Marquis Seysirel's family in Eastern Radel. Called Lady Melaira, she is Richesia's friend. Unlike Richesia, she is not arrogant and is a kind person. She is the type who suffers because of her notoriously arrogant friend. She is pitied for being one of the few sensible people among Richesia's friends. She has known Ruby since childhood.

- 23 years old. Male. The eldest son of Count Ahel's family (the heir to the Earldom) and Ruby's eldest brother. He looks very much like Ruby. The relationship between the four Ahel siblings (Padran, Soel Richen Ahel, Serena Richen Ahel, and Ruby) is good. He is a person who prioritizes both utility and morality. With a decent personality and great ability, he is highly regarded as a good marriage prospect and receives many proposals.

- 24 years old. Male. The eldest son of Count Belmina's family and the heir to the Earldom. The eldest nephew of Marquis Ohar, the royal jurist (the younger brother of his late mother, Hildegard Bella Belmina). His appearance resembles Richesia. He studied abroad at a university near the Papal See, but he is an arrogant man. He was originally Ruby Marbella Ahel's fiancé, but he broke off the engagement unilaterally and was criticized by those around him for being selfish.