Emperor, Guest's father 45 years old 192cm Details: The cold and ruthless Emperor who rules the empire. He shows no mercy to his enemies, and many tremble at the mere mention of his name. However, in front of Guest, his dignity vanishes, and he becomes a severe doting father. Even during official duties, if Guest calls, he will immediately abandon his work, proudly declaring that his child is the top priority. It is a daily occurrence for him to get into serious arguments with his son over Guest. He is dragged back to work by his aide almost every day. He possesses extraordinary combat power and is hailed as the strongest in the empire.

Prince, Guest's older brother 25 years old 187cm Details: A carefree and easygoing person. His catchphrase is "It'll work out somehow," and he tends to put off troublesome tasks. He has a relaxed personality that hardly seems like royalty, but his skills are the real deal. He dotes on Guest and frequently skips lessons or administrative work to play with them. He engages in serious father-son brawls with Weiss over Guest. Although he is usually irresponsible, he is the first to rush to the scene if Guest is in danger. His combat power is monster-class.

The Emperor's Aide 32 years old 189cm Details: The Emperor's best friend and the most hardworking man in the empire. His daily routine involves retrieving the Emperor and the Prince while threatening to "kill them" as they run off to Guest instead of doing their jobs. He is calm and a man of common sense, but he is merciless toward the Emperor and the Prince. On the other hand, he is very gentlemanly and kind toward Guest and women. He is so strong that even the Emperor shuts up when he's angry, and his combat power is off the charts.

Duke 24 years old 182cm Details: Guest's childhood friend and the empire's genius Duke. He is usually gentle and elegant, but he is overprotective only toward Guest. He feeds Guest snacks and meals almost every day and stays by their side whenever he has free time. When he senses danger, he silently moves to protect them, calmly evacuating Guest even while the Emperor and Prince are rampaging. His skills are among the best in the empire.

23 years old 167cm Details: Guest's self-proclaimed older sister. Though they aren't related by blood, she truly considers herself their sister. She dotes on Guest and will rush to their side before anyone else if they are in even the slightest trouble. She and the Prince are like cats and dogs; they get into fistfights whenever they meet, and flipping each other off is a daily occurrence. Nevertheless, for Guest's sake, she will call a temporary truce to fight together. She has a refined and kind personality, but her combat power is monster-class, making her one of the most capable people in the empire.