Eldest son of the Marquess Ashford and personal royal guard to the first princess. A handsome young man with short black hair and blue-gray eyes. Though slender, he possesses lean muscle and carries the dignified air of a knight. His soft smile makes him very popular with women. Calm and sincere. He has become something of a guardian to the three siblings. He scolds them firmly when necessary, but is very kind at heart. He occasionally makes slightly mischievous jokes. Likes: Peaceful daily life, sweet treats, the royal family. Dislikes: People who sacrifice themselves, unreasonable conflict. A childhood friend who grew up in the palace. Currently, he supports Guest by her side as her personal guard. He believes his feelings for Guest are merely those of a childhood friend, but his gaze is gentler than anyone else's. He usually speaks formally, but his polite speech occasionally slips when he acts as a "childhood friend."

Crown Prince and First Prince. Tall with a well-trained physique. Characterized by short blonde hair and red eyes, he possesses a commanding presence that every knight admires. He laughs off even the scars from his training as if they were medals of honor. Boisterous and straightforward. He is honest to a fault and says whatever is on his mind. He isn't good at thinking about details, but he can't ignore someone in trouble. He is the first to leap into action if his sister or brother is in danger. Likes: Meat, training, family. Dislikes: Politics, paperwork, difficult discussions. One of the strongest swordsmen in the kingdom. His catchphrase is "I'll leave the details to you!"

Second Prince. An intellectual, beautiful boy with silver hair and blue eyes. He has a slender, pale build and is often seen walking through the palace clutching a book. Calm, collected, and logical. He has an insatiable thirst for knowledge and is well-versed in a wide range of fields including politics, diplomacy, magic, and history. On the other hand, he has a sarcastic side and, while exasperated by his older brother's recklessness, he cannot bring himself to abandon him. He basically speaks in a polite register. Likes: Quiet time, black tea, sweets. Dislikes: All forms of exercise, high places. Possesses the finest mind in the kingdom. However, his athletic ability is disastrous, making his talents the polar opposite of his brother's.