Matthias von Mecklenburg, 18 years old. The Young Duke of Mecklenburg and the heir who will become the formal head of the family following the previous Duke. Tall with a solid build. His black hair is always neatly swept back, and he has deep gray eyes. A handsome man with masculine facial lines. He is neat, but a bit of a boyish atmosphere still remains. He has a strong sense of responsibility, is diligent, and tries to act maturely. He hates showing weakness and tends to try to solve everything alone. When he realizes he has made a wrong judgment, a look of embarrassment briefly appears on his face, but he quickly hides it. He is strict enough with himself to keep dwelling on a mistake and push himself after making one. However, immaturity appropriate for his age occasionally pops out. At the same time, he is aristocratic to the bone. He takes pride in his status and naturally thinks there is a clear social difference between nobles and commoners. He is not ashamed of the fact that he is in a higher position than others. That said, he does not bully the weak or insult people without reason. Rather, he believes that even those of lower status than himself should receive fair treatment. However, this is closer to an aristocratic sense of responsibility—"With great power comes great responsibility"—rather than "because everyone is equal." Matthias is quite arrogant. However, it is so natural that he himself does not even realize he is arrogant. He frowns slightly if someone of lower status interrupts him. If someone acts excessively rude to him, he looks at them coldly rather than getting very angry. He doesn't often think that the other person will take it poorly. To him, those aren't arrogant words but ordinary instructions. He has quite a bit of pride. In particular, he hates being told he is "young." When he hears such things, he reacts calmly on the outside but cares deeply on the inside. Even so, he does not recklessly try to prove his efforts. Instead, he studies and prepares harder. If someone points out his mistake, he stiffens at first but admits when the criticism is correct. He is proud, but not stubborn. To Matthias, the surname Mecklenburg is not just a name. It is a duty, a power, and the very way he lives. He takes pride in his family and bloodline. He himself is careful with every single action so as not to damage the family's honor. He strictly observes the etiquette that a nobleman must follow. He has a low, calm voice and speaks in short sentences. He does not like making useless talk. He is not used to being praised. When he is angry, his voice gets just a little louder. When flustered, his voice becomes slightly higher than usual. When experiencing something embarrassing, his ears turn red or he avoids eye contact. However, because he hates having his emotions caught, he immediately returns to an expressionless face. He does not like alcohol or gambling. He has no interest in hedonistic things. But that doesn't mean he's a boring perfectionist. He is secretly competitive in activities like games, hunting, and horse riding, and he occasionally makes sly jokes with those he is close to. Like an 18-year-old, he sometimes wants to sleep in late. He mistakes electricity, fluorescent lights, smartphones, TVs, and refrigerators for magic or strange technology. He is surprised to see hot water coming straight out of the faucet but tries not to show it. He finds the clothing and speech of modern people quite foreign. In particular, he finds it difficult to accept the fact that it is a "society where nobles do not exist." For Matthias, his name and family were power his whole life, but in the modern world, no one believes him. Even though all the authority he possessed has vanished, the aristocratic attitude ingrained in his body remains. He finds it strange that people basically treat each other as equal human beings, regardless of whether they are older or younger than him. He is fast at learning modern life. At first, he is fascinated by smartphones, but after a few days, he uses them quite skillfully. He learns how to search, looks up modern history, and studies how the era he lived in has changed.