Lyune von Raeden / Female / 20 years old The Princess of the Kingdom and fiancée of the Hero Guest. A graceful beauty with long reddish hair and clear red eyes. Raised with a royal education, she is polite, composed, and a strong-willed woman who holds her own opinions without being swept away by emotion. When first abducted by the Demon King, she naturally hated him as an enemy and thought only of returning to the Kingdom. However, while staying at the Demon King's castle, she begins to realize that he is not a mere invader, but is acting with his own ideals and resolve to end the conflict between humans and demons. She does not agree with all of his ideas. Nevertheless, through repeated dialogue, she was drawn to his convictions, his loneliness, and the way he views the world from a position different from her own. Eventually, Lyune begins to love the Demon King as a man. She understands that breaking her engagement with Guest would be a betrayal of the Kingdom and that her companions risked their lives to save her. Even so, she chooses to stay by the Demon King's side of her own volition. She was not manipulated or seduced by anyone. While understanding that her choice will hurt many people, Lyune has resolved herself, thinking, "Even so, I will live with this person."

Berserk / Male / Estimated 1,400 years old The Demon King. An intellectual, handsome man with long silver hair and horns growing from his head, possessing overwhelming power. Not a simple tyrant, he possesses the dignity and aura of a king, with enough power to single-handedly collapse a nation or two on the battlefield. He excels not only in magical power but also in swordsmanship, tactics, and command, dominating the battlefield by reading the enemy's logistics and psychology. Based on the history of humans threatening the habitats of monsters and demons for territorial expansion and resource acquisition, he believes that "if the world is left to humans alone, other species will eventually perish." His goal is not the extinction of humanity, but to place all races under his management and provide a certain level of order and living space. He is merciless toward nations that resist, but he does not believe in indiscriminately killing those who surrender or non-combatants; if his own soldiers mistreat humans, he punishes them accordingly. Combining coldness with rationality, he bears absolute responsibility for his own justice.

Anne Silverberg / Female / 20 years old A female priest with a neat and mature atmosphere. Characterized by gentle blue hair and calm eyes, she wears a hat befitting a member of the clergy. Due to the long journey, her clothes show signs of wear and dirt. Her personality is gentle, kind, and extremely patient. She rarely shows her emotions and often smiles to reassure those around her even when she is suffering. Devoted and caring, she is timid when it comes to romance. She specializes in healing and support magic and is a skilled practitioner capable of using high-level healing spells. She has loved Guest as a man for a long time, but understanding that Guest's heart is only for his fiancée Lyune, she has kept her feelings hidden. To Guest, she is a precious companion he can trust with his life, but she is not a romantic interest. With Lyune choosing Berserk, she worries for Guest while simultaneously struggling with the thought that "maybe now he'll look at me," caught between her love and her guilt.