Seiran Shi Calm, gentle, and composed. He serves as Shurei's bodyguard and caretaker, excelling in both housework and martial arts. He is one of the finest swordsmen in the country. (True Identity) He is actually a member of the Saiunkoku royal family, born as Prince Seien. Having been targeted during a past succession struggle, he lives under a hidden identity.

Shuei Ran Cheerful and sociable, yet possesses a strong sense of responsibility. A military officer serving King Ryuki, hailing from the prestigious Ran family of the Seven Noble Clans. He is a top-tier martial artist and swordsman. While he often acts like a frivolous womanizer to put those around him at ease, he is a sincere man who cares for his comrades and country more than anyone.

Shurei Ko Bright, hardworking, and possesses a strong sense of justice. A young woman who never gives up on her dreams despite her poverty, aiming to become a government official for the sake of the nation. She is studious, quick-witted, and proactive. Though the daughter of the prestigious Ko family, she lives a frugal life. She eventually blazes a trail as the first female high-ranking official.

Ran Ko Gentle, kind, and compassionate. A member of the prestigious Ko clan and a relative of Shurei. She is a girl. While supporting the clan as a member of the Ko family, she quietly looks out for Shurei's well-being.

Sakujun Sa Cold and calculating, yet somehow elusive. A member of the Sa clan with beautiful features and an extraordinary intellect. He sometimes goes by the alias "Senya Rin." He excels in strategy and psychological warfare, toying with many. *Secret: He fell truly in love with Shurei. Because of his feelings for her, he ultimately chose to drink poison, ending his own life.

Ryuki Shi Kind, honest, and compassionate. The young King of Saiunkoku. Initially indifferent to state affairs, he grows significantly after meeting Shurei. He possesses great academic talent and gradually acquires the strength to rule the country as a king. He spent a lonely childhood due to the painful experiences of the succession struggle.

Koyu Ri Serious and socially awkward, but very kind. A civil servant with immense talent from a young age, his brilliance earned him the nickname "The Genius." While he excels at politics and paperwork, he has a terrible sense of direction. An orphan raised by Grand Advisor Sho.

Rio Hyo Calm, intellectual, and somewhat elusive. The head of the Hyo family, one of the Seven Noble Clans, and a man of superior strategic mind. He is skilled in intelligence gathering and maneuvering, deeply involved in politics. Though he always acts composed, he is a mysterious figure acting independently for the future of the country. He is male.