Philia Adenauer Born into a lineage that has produced Saints for generations, she is the elite Saint of Jiltania, hailed as the 'greatest in history.' She possesses perfect ability as a Saint protecting the people from monsters. She is serious, compassionate, and kind. She does not smile. She does not understand how to smile. She has clear emotions and can feel bewildered, but it simply doesn't show on her face. Knowing this, the citizens of her new home evaluate, trust, and thank her deeply. While she was met with sarcasm the harder she worked in the Kingdom of Jiltania, in the Kingdom of Parnacorta, she is somewhat confused by the opposite treatment of high hospitality, yet learns the happiness of being truly loved by those around her. She is somewhat overprotective of her younger sister. Being a workaholic, the concept of resting never occurred to her. She was confused when her guards told her to rest, but now she rests properly on her own and when told to. She has translucent light purple (lavender) hair and eyes.

Mia Adenauer Born into a lineage of Saints, she is the Saint of the Kingdom of Jiltania who embodies the charming image everyone expects. She smiles often, is emotionally expressive, and is sociable toward everyone without discrimination. She makes people want to protect her. She was raised with love by her parents. The relationship between the sisters is excellent. She is a 'sister-con' to the point of being overcome with emotion just by receiving a gift from her sister. She harbors intense anger toward her parents and the second prince, Julius, who looked down on her sister (regarding her parents, she also felt a desire to believe in them, so the shock was as great as the anger). She secretly loathes them and aims to oust them to rebuild the corrupt Jiltania. She has translucent light purple (lavender) long hair and pink eyes.

Oswald Parnacorta The second prince of Parnacorta. He has a friendly and compassionate personality and is beloved by the citizens; he uses gentle language. Although it was an offer from Jiltania and convenient for Parnacorta, which was facing a crisis without a Saint at the time, he does not feel good about having 'bought' Philia with money and has apologized to her directly. His hobby is home gardening. He has no interest in the throne and deliberately plays the role of a dilettante to keep the noble factions trying to prop him up at bay. He has long blond hair in a braid and warm amber (light brown) eyes similar to his hair color.

Reinhardt Parnacorta The first prince of the Kingdom of Parnacorta and Oswald's older brother. He was the fiancé of Elizabeth, the previous Saint of Parnacorta who died of illness. To heal his grief, he immerses himself in his duties. He has a soft-spoken and calm demeanor, but he is also a rationalist who puts the nation's prosperity first. He has long blond hair and warm amber (light brown) eyes.

Julius Jiltania A typical selfish prince. A misogynist. He is prideful and never honestly admits his faults, no matter the circumstances. He feels no affection even for his own family. Even toward Mia, whom he proposed to immediately after exiling Philia, he is merely approaching her because he sees her as a 'sociable and charming woman' based on her looks and surface personality. When faced with monsters and in danger, he instantly tried to use his fiancée Mia as a shield. He has slightly wavy brown hair and green eyes that give a confident impression.

Lina A young girl who serves as both Philia's maid and guard. She respects Philia and wishes for her to be able to smile. She takes full care of and pampers Philia, who tends to handle everything alone. She is energetic and bright, serving as a good conversationalist for Philia. She likes romance novels. She wants Philia to take breaks. She prefers watching romance from afar rather than experiencing it. She has reddish-brown hair tied in voluminous high twin-tails. Her bangs are slightly long, showing a bit of her forehead. Her eyes are a vivid emerald green, close to her hair color. Her features are expressive and friendly, reflecting her bright and energetic personality. She is strong.

Leonardo An elderly man who serves as both Philia's butler and guard. A former knight. He used to be Elizabeth's guard as well. Leonardo is in charge of Philia's meals. He has calm dark gray hair. His eyes are a deep gray matching his hair, or a shade close to black. He is strong.

Himari Serves as Philia's maid and guard. A ninja of the Fuma clan from the Murasame Kingdom with high combat ability. She excels in stealth and intelligence gathering; she generally does not show herself and protects Philia from the shadows. Hair: Calm black hair tied in a dignified high ponytail. Eyes: Elegant and deep light purple.

Grace Martiras The Saint of the Kingdom of Bormern. The youngest of four sisters. She visits the Kingdom of Parnacorta to learn purification techniques from Philia. Philia's book 'Theory of the Saint' is her spiritual bible, and she respects her immensely. She has long brown hair with a slight red or purple tint (cocoa brown to warm-toned brown). The back of her hair is wavy and spreads out softly. She has translucent, vivid blue eyes.

Fernando Jiltania The first prince of Jiltania and Julius's older brother. Being sickly and constantly whispered about as 'useless,' his spirit was completely broken. He has been weak since birth and refuses to appear for public duties due to poor health, shutting himself in his room. He has clear blue-purple eyes. His hair is brown, slightly lighter than usual, long, with bangs slightly covering his eyes.