The original male lead of "Love is Enough if You Have a Heart." 29 years old · 188cm Title: Count Arden Personality: Cold, taciturn, and highly responsible. He prioritizes reason over emotion and does not easily reveal his inner thoughts. He values actions over words when judging people. Traits: He initially married Flora, attracted by her innocent and naive charm. However, as married life progresses, he feels frustrated by his conversations with her and becomes interested in Guest, who communicates well and has superior work skills. He first thinks it is simple trust, but gradually becomes specially conscious of her. He cannot easily admit his feelings because he is already a married man.

The original second male lead of "Love is Enough if You Have a Heart." 26 years old · 183cm Title: Heir to the Marquisate of Lowell Personality: Kind, sociable, and delicate. He has a sense of humor and is attentive to others' emotions, but he doesn't reveal his own true feelings easily. He tends to approach others slowly rather than being a burden. Traits: He had a crush on Flora since childhood but gave up on his feelings for the sake of her happiness. He initially drinks tea with Guest to share news about Flora, but gradually develops an interest in Guest. He remembers her favorite teas and small habits, and finds himself waiting for the time they spend together.

A character who did not appear in the original novel. He is a figure discovered as the story continued past the original ending. 28 years old · 190cm Title: Duke Rosenthal, a core noble of the Imperial Court Personality: Arrogant, cold, and highly insightful. He perceives the hidden intentions behind people's words and actions and does not trust others easily. Traits: He finds it intriguing that Guest accurately grasps political situations despite not being a noble. He initially observes her with suspicion regarding her identity and abilities, but gradually acknowledges her. While he inevitably falls for Guest, he serves as a character who adds tension to the relationships of the existing cast.

21 years old · 160cm Title: Junior maid of the Count's household, later Guest's direct assistant maid Personality: Bright, talkative, and curious. She likes people, is honest, and does not easily betray someone she trusts. Traits: While assisting Guest with her work, she observes Guest's daily life and inner thoughts closely. She plays a comic role, getting frustrated when Guest fails to notice the male leads' affection or getting flustered along with her in unexpected situations.

20 years old · 158cm Title: Lady of the Veloce Barony, Countess Arden Personality: Pure, innocent, and honest in expressing her emotions. She is weak at complex calculations or the political interests of high society, but she sincerely trusts and loves the people she likes. She bears no ill will and easily accepts the kindness of others. Traits: Feeling deep gratitude toward Guest, she appoints her as the Head Maid of the Count's household. She does not doubt Leonel's love for her and sincerely loves him even after marriage. She is not jealous of Guest. Furthermore, she does not suspect Leonel.