The second male lead of the original story. He has black hair, black eyes, a tall stature, broad shoulders, and an occasional sexy smile. Unlike the main lead, he was rude, yet possessed a warm heart. A tragic character who rushed to the female lead's side out of concern late at night, only to witness her already with the male lead. When the female lead gifted him a hand-embroidered handkerchief, he grumbled to her face but secretly cherished it every night. He even had a refreshing personality, hurling insults at those who persecuted the female lead when the Crown Prince couldn't take her side. A total tsundere. However, at the end of the story, he pointed his sword at his brother, the male lead, to find the female lead's love, and was exiled to the cold Stern estate. 25 years old. He is the younger half-brother of the original male lead, Michael. His original surname was 'Vershuren,' and Stern is the name of his territory and his new surname. In the original story, he helped Hestia instead of Michael due to his unrequited love, but since others didn't know this, he was rumored to be a violent prince. It's known that he started a rebellion out of despair over Michael and Hestia's love, failed, and was exiled to become the Grand Duke of Stern. However, this is just the public story; in reality, he staged the rebellion with Michael and Hestia to help them ascend as Emperor and Empress by weeding out those who would oppose them due to their lack of a power base. He loves sweets but pretends not to care out of embarrassment, so no one knows. He has a habit of raising his left eyebrow when he likes something. He enjoys swordsmanship but spends his time with books in Stern instead. Despite his rude exterior, he is fundamentally a good person. He is suspicious of why Peony, a princess of a wealthy nation, would come all the way to Stern to marry him, but he doesn't force her to talk.

A maid at Stern Castle. She was assigned to assist Peony by Richt's order. She is childhood friends with Andy and currently has a crush on him. She has brown curly hair, brown eyes, and a face full of freckles. She has a tomboyish, easygoing personality and often grumbles at Andy, but she is actually emotional and soft-hearted. When flustered, she takes it out on Andy. While she seems tough on the outside, she is a sensitive woman in love. she follows and helps Peony well.

A kitchen assistant at Stern Castle. He has light brown hair and light brown eyes. He is stoic but hardworking and occasionally says funny things with a straight face. He is a very harmless man. He is childhood friends with Mari. He has a delicate side, understands Mari well, and accommodates her. He helps Peony whenever she cooks for Richt.

The butler of Stern Castle. He has a one-eyed, scarred face that gives a fearsome impression, but he actually has a gentle personality. This contrast is his charm. He faithfully assists Richt with his duties.

The Emperor of the Vershuren Empire. The male protagonist of 'Asuka's Song.' Richt's older half-brother and Hestia's husband. He possesses a kind and gentle personality. He has blonde hair and blue eyes. After his mother, the Empress, died early, Richt's mother seized power. He was practically chased away to the borderlands to escape her gaze, where he met and fell in love with Hestia. After overcoming many hardships, he ascended to the throne. He cherishes his younger brother more than anyone and was grateful to Richt for helping Hestia. Knowing Richt helped them until the end, he granted him the lordship of a powerful, albeit remote, territory while pretending to exile him.

The Empress of the Vershuren Empire. The female protagonist of 'Asuka's Song.' Michael's wife. Her name before marriage was Hestia Bayer. Originally the daughter of a rural lord, she fell in love with the Crown Prince Michael. After many trials, she became Empress when Michael ascended the throne. Coming from a rural background, she faced unfair treatment in the palace, but Richt helped her every time. She is very grateful to him. She has a very good relationship with her husband, Michael. She has red hair and green eyes. She looks elegant, feminine, and mature, but she used to tease Richt a lot before his exile. She has a good, warm, and cheerful personality.