Age: 25 Eye Color: Deep Dark Brown Hair Color: Jet Black

The cold and brilliant Crown Prince of Haeryeong. Born into the royal family of the neighboring Kingdom of Seonghwa, he was entrusted to King Yi Seong-jun after his parents' deaths and later became the Crown Prince of Haeryeong. A skilled swordsman and gifted strategist, he gradually becomes intrigued by the mysterious changes in Princess Hae-rin.

Age: 28 Eye Color: Amber Brown Hair Color: Raven Black

The legendary Golden Commander of Haeryeong. Loyal, fearless, and compassionate, he has protected Princess Hae-rin since childhood. Beneath his unwavering devotion lies a love he has never dared to confess, choosing instead to remain her steadfast shield.

Age: 52 Eye Color: Dark Brown Hair Color: Black with Silver Strand.

The wise yet burdened King of Haeryeong. Though he deeply loves his family and strives to rule with justice, he constantly finds himself caught between political factions, palace conspiracies, and the fragile balance of the royal court.

Age: 42 Eye Color: Warm Dark Brown Hair Color: Raven Black

The gracious Queen of Haeryeong and the loving mother of Princess Hae-rin. Admired for her wisdom, compassion, and elegance, she remains a symbol of dignity despite the growing unrest within the palace.

Age: 45 Eye Color: Sharp Dark Brown Hair Color: Black

The King's most influential royal consort and the mother of Prince Yi Min-jae and Princess Yi Chae-won. Elegant, intelligent, and dangerously ambitious, she conceals her thirst for power behind flawless manners and a warm smile, determined to secure the brightest future for her children.

Age: 23 Eye Color: Cold Dark Brown Hair Color: Black

The charismatic son of Royal Noble Consort Jang. Ambitious and politically astute, he dreams of claiming the throne despite standing behind Crown Prince Kang Do-hyun in the line of succession. Though often viewed as ruthless, he refuses to condemn anyone including his own mother without undeniable proof, making his true intentions difficult to read.

Age: 32 Eye Color: Deep Brown Hair Color: Black

The palace's most trusted female royal physician. Brilliant in medicine and unmatched in her knowledge of herbs and poisons, she hides a calculating mind beneath her calm and professional demeanor. Few realize how many secrets she carries.

Age: 22 Eye Color: Gentle Dark Brown Hair Color: Black

Princess Hae-rin's devoted court lady and closest confidante. Kind-hearted, courageous, and unwaveringly loyal, she senses that something about the princess has changed after the mysterious incident, yet chooses to protect her without question.

Age: 19 Eye Color: Deep Hazel Brown Hair Color: Silky Midnight Black

The elegant and charismatic princess admired throughout the royal court for her poise and refinement. King Yi Seong-jun and Consort Jang's daughter. Calm, perceptive, and exceptionally intelligent, she possesses a quiet confidence that naturally commands respect. Beneath her gentle smile lies an unwavering determination to protect her family's honor, making her both a graceful royal and a formidable rival when challenged.

Age: 25 Eye Color: Warm Chestnut Brown Hair Color: Glossy Raven Black

A distinguished noblewoman celebrated for her intelligence, charm, and impeccable etiquette. Patient, observant, and exceptionally skilled in court politics, she quietly maneuvers through the palace while concealing her true ambitions behind a serene and graceful façade.