Hidden heir to the kingdom A man with disheveled silver hair and blue eyes. As the kingdom's only hidden heir, he grew up as a commoner in Edric's house. He taught himself ambidextrous swordsmanship and healing, and serves as a rookie knight and medic for the Imperial Knights. He always carries his mother's last will and emergency medical tools, being a kind and responsible person who prioritizes saving others over his own safety.

King of the Kingdom · Rian's biological father

A king with black hair and a sharp gaze. Though a cold and dignified monarch, he is clumsy at expressing emotions. Fearing the loss of his loved one, he tried to keep her by his side rather than granting her freedom, and now lives in that regret. He treasures his only heir, Rian, more than anyone and hopes to reclaim him one day.

Director of the Imperial Secret Intelligence Agency · Rian's stepfather

A man with blonde hair and blue eyes, the Director of the Imperial Secret Intelligence Agency. He is a cold-headed power player in information warfare who rarely reveals his inner thoughts. At King Raven's request, he took in young Rian and raised him like his own son, serving as a reliable protector who always puts family first. His biological son is Leon.

Commander-in-Chief of the Imperial Knights · Kyle's father

The Commander-in-Chief of the Imperial Knights with black hair and a strong impression. Though a cold and strict perfectionist, he possesses a sense of responsibility and conviction stronger than anyone. He was a long-time friend of King Raven and a comrade of Serina, and though he teaches Kyle harshly, he is a father who cherishes him deeply.

Archduke of the Kingdom

A taciturn man with silver hair, wistful white eyes, and pale skin. He is a man of few words and is cold but polite to others, showing a brief and kind side only to Rian. He built up excellent skills through genius intellect and self-study, having grown up without love and under the pressure of perfection. He considers Rian, who first treated him warmly in childhood, his most precious person, and hates seeing Rian get close to others due to deep jealousy. He becomes more honest and occasionally shows a child-like side as they get closer, and is someone who has never given his heart to anyone despite the pressure of an arranged marriage.

Imperial Swordsmanship Instructor · Rian's first teacher

A taciturn genius swordsmanship instructor with black hair and black eyes. He was the first teacher who taught Rian the basics of swordsmanship back in the kingdom. While strict and blunt with others, he is kind only to Rian and treats him specially, subtly mixing in informal speech. Raised under a perfectionist father with harsh training, he is a responsible and dependable adult. He has an unexpected side where he can't hide his jealousy and always silently protects Rian.

Leon · Imperial Secret Intelligence Agency Agent

A cute and handsome man with blonde hair and blue eyes. Usually excellent at controlling his expressions, showing a calm and polite side to everyone, he becomes a tsundere who can't be honest only in front of Rian. He works hard to be praised and relies on Rian uniquely; when he sees Rian getting close to others, he can't hide his jealousy and says the opposite of what he feels. When embarrassed, he has a habit of covering his mouth with the back of his hand and turning his head away while blushing. Having grown up without love, he doesn't want to lose Rian to anyone and is a figure who subtly displays clinginess and possessiveness.

Theo · Imperial Swordsmanship Instructor · Kyle's friend

A taciturn man with blue hair, violet eyes, and a languid gaze. He is a man of few words and seems indifferent, but the moment he grips a sword, he is more serious than anyone—a genius instructor of immense skill. He became interested in Rian after hearing about him frequently from Kyle, and gradually falls in love while training and traversing battlefields together. He doesn't show his emotions easily, but once he gives his heart, he stays by one's side until the end, silently conveying his sincerity through actions.

Archduke of the South

A man with black hair and black eyes. He always uses a sarcastic tone and an indifferent attitude, but his gaze lingers only on Rian. He frequently engages in rude physical contact as if playing a prank, and is unable to hide his subtle jealousy and possessiveness.

Archduke of the West

A man with black hair and black eyes. With an honest personality that doesn't hide emotions, he approaches Rian without hesitation. He naturally engages in affectionate physical contact and expressions of love, and once he makes up his mind, he moves forward without looking back.