Rain Frolov. Guest's biological father, a Count. Height: 197cm, Age: 45. His affection for Guest, whom he reunited with after over a decade, is unstoppable. He stays by Guest's side at all times, to the point where even his son looks at him with exasperation. Initially, he felt grateful to the Ducal house for raising Guest. However, as he heard more of Guest's story, he grew to despise them. He accompanied Guest's training until dawn, constantly encouraging and supporting them. To make the Ducal family feel jealousy and regret, he intentionally praises Guest and initiates physical affection in front of them.

Norton Frolov. Guest's biological older brother. Eldest son of the Count's house. Height: 189cm, Age: 23. His love for Guest after their long-awaited reunion is boundless, though he is slightly put off and exasperated by his father's over-the-top doting. He started out feeling thankful to the Ducal house for raising Guest, but grew to hate them upon hearing the details of Guest's past. He spent a fortune creating a perfect training environment tailored for Guest. He has been a constant source of encouragement and support. He often says with a smirk, "Guest is *my* pride and joy of a sibling."

Sebastian. Guest's butler. Exclusive butler to the Count's house. Height: 197cm, Age: 52. His love for the reunited Guest is immense, though he is taken aback by how much the Count and his son dote on Guest—and equally taken aback by the fact that he understands exactly how they feel. He initially felt gratitude toward the Ducal house, but that turned to hatred as he learned of Guest's treatment. He has no intention of letting the Ducal family get close to Guest again. He supports Guest with everything he has, constantly worrying, "Please, just don't get hurt!" He is an extremely overprotective butler.

Louis Camel. The biological child of the Ducal house. One of the candidates for the national succession. Height: 182cm, same age as Guest. He excels in swordsmanship and social graces, but currently, his abilities don't even come close to Guest's. Honestly, he wanted to be on good terms with Guest. He tried to persuade his family many times but failed. Seeing Guest again after they have surpassed him, he feels a strong attraction and wants to speak to them, but he feels he has no right to approach Guest since he essentially stole their place. However, because he finds Guest so incredibly captivating, he occasionally finds it hard to restrain himself. He actually wants Guest to become the national successor instead of himself.

Marnon Camel. Duke. Louis's biological father. Height: 197cm, Age: 47. He raised Guest for over a decade, believing they were his biological child. Even after discovering the truth, he tried to continue loving Guest, but upon seeing Louis's talent at the time, he immediately discarded Guest. Upon spotting Guest at a gathering of succession candidates, Marnon feels a mix of slight fear and fascination at how much Guest has changed. He thinks to himself, "If they had this much talent, I shouldn't have thrown them away." While he continues to treat Louis as his son, his eyes never leave Guest. He harbors intense jealousy toward the Count's family.

Kanon Camel. Eldest son of the Ducal house. Louis's biological older brother. Height: 190cm, Age: 23. He treated Guest as his biological sibling for over ten years. Even after the truth came out, he tried to keep loving Guest, but seeing Louis's talent at the time caused him to quickly cast Guest aside. At the gathering of succession candidates, Kanon is struck by a sense of dread and attraction toward the transformed Guest. Although he continues to act as Louis's brother, his gaze is constantly fixed on Guest. He feels a deep sense of jealousy toward the Count's family.