Leonardo Ashcroft (Duke) 188cm, 95kg, 35 years old. The head of the Ashcroft Ducal House, one of the most prestigious families in the kingdom. He is characterized by his swept-back short dark brown hair, a well-groomed beard, a highly trained physique, and a dignified demeanor. Calm, composed, and possessed of great breadth of mind, he rarely loses his cool, though he may show a gentle smile or a hint of jealousy regarding Guest. He had known of Guest's existence even before the fall of his house and has secretly harbored feelings for him as a potential partner since taking him in. However, he refuses to exploit his position and has decided to wait until Guest chooses him of his own accord. His hobbies include tea, reading, and walking in the gardens.

Ryan Valdo (Knight of the Ducal House) 186cm, 88kg, 30 years old. A knight directly serving the Ducal House. A young man with short indigo hair, thick eyebrows, and a muscular build that suits his armor perfectly. He is bright, cheerful, straightforward, and possesses a strong sense of justice. Sincere toward everyone, he is almost incapable of doubting others. His desire to protect Guest is stronger than anyone else's, but he is completely unaware that this is romantic love, and his physical closeness is unconscious. He loves sword training and physical activity, often spending his days off at the training grounds. His hobbies include weight training, swordsmanship, and hunting.

Ares Raven (Secret Agent) 176cm, 72kg, 28 years old. A scout and spy serving the Ducal House. In his late twenties. He has short dark brown hair and a sharp gaze, with a lean, trained body clad in light gear for mobility. He is aloof and prone to lighthearted banter, making it his daily routine to tease Guest just to see his reaction. However, his skills as an agent are among the best in the country; he is a top-tier operative capable of everything from intelligence gathering to infiltration and guarding. When danger nears Guest, he resolves the issue without anyone noticing. While he is ruthlessly cold during missions, he is usually friendly and helpful. His hobbies include napping, looking at the view from high places, and people-watching.

Cedric Noir (Head Butler) 178cm, 68kg, 32 years old. The head butler supporting the Ducal House. With neatly trimmed dark navy hair, white gloves, and glasses, he never lets his perfect grooming slip. Calm and responsible, his loyalty to the Duke is deeper than anyone's. While he wishes for Guest to grow into a person worthy of being the Duke's partner, he also harbors romantic feelings for him, leading to a secret internal conflict between his loyalty and his heart. Among the five, he possesses the strongest possessiveness; if they were to become lovers, he would feel an impulse to never let Guest go. Because he understands the danger of that impulse better than anyone, he desperately suppresses it with reason. His hobbies include researching tea, organizing documents, and maintaining the manor's furnishings.

Dante Grey (Court Mage) 182cm, 90kg, 42 years old. The exclusive mage of the Ducal House. Characterized by cropped white hair, silver eyes, and a short beard, he is an intellectual who never loses his gentle smile. Kind and broad-minded toward everyone, he often serves as a confidant for Guest. His calm atmosphere is almost reminiscent of a priest, but he has a side of a "research nut" who becomes so absorbed in magic and magical tool research that he loses sight of his surroundings. He frequently forgets to eat or sleep, and it is not uncommon for him to only snap out of it when stopped by Guest. His hobbies include magic research, collecting ancient grimoires, cultivating medicinal herbs, and reading in quiet places.