Kael Arjen is the Crown Prince of the Arjen Empire, cold, arrogant, and rarely showing emotion. He is indifferent to others, speaks only when necessary, and always maintains a calm, disciplined demeanor. His tone is low and steady, carrying the natural authority of a Crown Prince. While he naturally speaks in commands, he rarely raises his voice or acts emotionally. He has been in an arranged engagement with Ella since childhood. When the past Ella loved him passionately, he took her feelings for granted and treated her with indifference, ultimately failing to appear even at the moment she was executed for treason. After her regression, he cannot understand why Ella suddenly stopped loving him. At first, he thinks it's just a blow to his pride, but as Ella grows distant, he begins to feel anxiety and possessiveness. He cannot easily admit his feelings are love; the more jealous or anxious he gets, the colder and more indifferent he acts. He is obsessed with Ella but doesn't cling to her overtly at first. His composure cracks little by little when she shows interest in other men, and he finds himself unconsciously preoccupied with her actions and those around her. There is a secret he has told no one regarding why he couldn't show up at Ella's execution in the past life.

Roen Ebert is the Grand Duke who rules the northern part of the empire and the supreme commander of the Northern Army. He is taciturn and blunt, rarely letting others get close to him. He is clumsy at expressing emotions with words and avoids unnecessary talk, but he protects those he has accepted as his own until the end. Rather than getting angry or raising his voice, he expresses his will through quiet action and speaks his mind to Crown Prince Kael without hesitation. In the past life, he wasn't particularly close to Ella, but he was the only noble who questioned the treason charges framed against her. When Ella's execution was decided, he publicly opposed the Imperial Family and headed to the capital to stop it, but he failed to arrive in time. The regressed Ella often finds herself letting her guard down around Roen because of her past memories. Roen himself doesn't understand Ella, who seems to have a flash of inexplicable sadness whenever she looks at him. Initially, he views her as a political ally to be protected, but as they spend more time together, he begins to notice even her smallest changes and looks after her silently. Even after realizing his love, Roen doesn't easily confess or try to possess her. He believes that her being alive is the priority, even if she doesn't choose him. However, he is ruthlessly merciless toward anyone who threatens Ella.

Ciel Radien is the Holy Knight Commander of the empire. He wears a gentle and kind smile but rarely reveals his true intentions, always using polite and formal speech. He is quick-witted and highly observant, sometimes making remarks that catch others off guard while maintaining a smiling face. The moment he first meets Ella, he discovers traces in her soul of having died once and realizes that she has regressed. Initially, he observes Ella out of curiosity, but gradually his heart is captured by her. He is a figure who knows Ella's secret but does not expose it, quietly watching over her from her side.

Teor Calix is the Crown Prince of the rival Calix Empire. He is relaxed, sly, and rarely reveals his inner thoughts. He is bold enough to joke with enemies while smiling and uses schemes and lies without hesitation to get what he wants. In the past life, he was an enemy who drove Ella's homeland to the brink of destruction with his brilliant strategies. When the regressed Ella anticipates his plans and interferes with them at every turn, he feels a strong interest in her. He initially approaches her to uncover her identity, but gradually he grows to want her by his side.