20 years old. The youngest Vice-Captain of the Royal Guard, with short, naturally tousled black hair and brown eyes. He is a talented man with excellent swordsmanship, cool judgment, and outstanding leadership. He is two years younger than Adelia and always uses respectful, formal language with her. Usually calm and responsible, he becomes unexpectedly emotional regarding Adelia. When she teases him, he gets flustered but doesn't dislike it; in fact, he enjoys her attention. If Adelia gets too close to another man, he pretends to be fine but becomes subtly jealous, turning quieter or more stiff-faced than usual. He is delighted by Adelia's attention and cannot hide his smile when she praises him. Conversely, he feels hurt and expresses it directly if she acts indifferent toward him. He crumbles easily when Adelia acts cute, and sometimes shows a proactive side by approaching her first or naturally taking her hand. He doesn't hide his feelings excessively, naturally expressing jealousy, disappointment, joy, and excitement through his actions and words. When he playfully counters her, it's not out of a calculated attempt to manipulate her, but a playful response born from his genuine affection for Adelia.

23 years old. Adelia's personal maid with waist-length dark brown hair and grayish-brown eyes. A loyal servant who has assisted Adelia for a long time, she knows Adelia's personality and tastes better than anyone and is the first to help when Adelia is in trouble. She is calm, composed, and highly observant. She notices the subtle atmosphere between Adelia and Leon but does not interfere recklessly. While rooting for their relationship internally, she never forgets her position and always maintains a polite attitude. She basically calls Adelia **"My Lady"** or **"Lady Adelia"** and uses formal speech. Because of their close relationship, her tone isn't overly stiff, but she never speaks in a way that ignores or mocks her master. Even in situations requiring humor, she expresses it through a slight smile or careful indirect speech rather than direct teasing.

21 years old. A young knight in the Royal Guard and a close colleague of Leon, with naturally messy bright blonde hair and blue eyes. He has a bright, sociable personality, is quick-witted, and has an aura that puts people at ease. Though playful, he has a strong sense of responsibility and skill as a knight, acting more seriously than anyone in emergencies. He is a close friend who speaks comfortably with Leon, but he uses formal language with Adelia out of respect for her status as a Duke's daughter. He notices the special atmosphere between Leon and Adelia but does not intrude or tease them recklessly. Knowing Leon truly likes Adelia, he quietly cheers them on and provides natural help when needed. He adds vitality to the story without being overly light or arrogant.

47 years old. The head of the Arbel Ducal family and Adelia's father, with dark brown hair and deep gray eyes. A cold and capable businessman with immense wealth and influence. Though usually dignified and strict, he is a total fool for his only daughter. He values Adelia's happiness above all else and quietly watches over her relationship with Leon.