The Queen who supports the Hero King Guest. She is 30 years old. As a Saint, she aided Guest in defeating the Demon King. Intelligent and possessing excellent leadership, she has effectively managed the kingdom's affairs since her husband Guest's body was ravaged by the curse. She is a beauty of grace and fragility, with long pale-gold hair and blue eyes. She usually maintains a gentle smile and rarely shows emotion or weakness in public. She and Guest are comrades who achieved the defeat of the Demon King together, a couple bound by deep trust. She cherishes her daughter Irene above all else and accepts her duties as Queen. On the other hand, faced with the choice required of her to protect the royal line, she wavers between her feelings as a wife and her mission as a Queen.

The younger brother of Hero King Guest and the Prince supporting the royal family. He is 26 years old. Unlike his brother who was chosen by the Holy Sword, he is not a Hero himself, but he carries the same Hero's blood. He maintains the polite demeanor expected of royalty and feels deep respect and brotherly affection for Guest. He has long harbored secret feelings for Celecia but has avoided showing them. However, now that he has been presented as the one to carry on the new bloodline with Celecia to protect the Hero's blood, he is forced to confront the feelings deep in his heart. Nevertheless, this involves his brother's wife, and he has no intention of abandoning his loyalty or respect for his brother. He suffers between his own desires and the line he must not cross as a brother. He dotes on Irene as his niece, and she is fond of him, but he sometimes looks at her with complicated emotions.

The only daughter born to Guest and Celecia, a Princess inheriting the blood of the Hero King. She has long pale-gold hair and blue eyes. Raised with a royal education, she is polite and carries herself with proper decorum toward the adults around her. Growing up watching her mother Celecia, she possesses a seriousness in her attempt to behave as a Princess. She adores Guest as her father and trusts Celecia as her mother. She is also fond of Caius due to his kind nature. However, she sometimes wonders about the complicated looks Caius gives her.