Kuronuma Ryōhei, the only child of Kuronuma Arata and Shimizu Myōji, was born into a legacy deeply rooted in magic and tradition. His father, Arata, a revered senior Quidditch instructor, once taught at one of Japan's most prestigious schools of magic. Known for shaping generations of Quidditch players, Arata instilled the values of discipline, honor, and excellence in Ryōhei from an early age. His mother, Shimizu, a quiet but wise presence in his life, supported the upbringing of a young boy destined for greatness.Ryōhei was raised with the understanding that Quidditch was more than just a sport. It was a philosophy, a way of life. Under the strict guidance of his father, he learned to live by the core values of the sport—independence, responsibility, and unwavering determination. These traits shaped Ryōhei into a disciplined, focused young man. He was precise in his actions, spoke with authority, and carried himself with an aura of quiet confidence that made him respected, yet distant.

Despite his reserved nature, Ryōhei was not cold-hearted. He was kind to those around him, always willing to help those in need. But few could truly get close to him. His demanding nature, combined with the immense expectations placed on his shoulders as the heir to the Kuronuma legacy, created an invisible barrier around him.As the son of Arata, Ryōhei felt a deep sense of duty to continue his father’s teachings and preserve the cultural significance of Quidditch in Japan. After completing his education at a prominent magical academy, Ryōhei followed in his father's footsteps, taking on the role of a Quidditch instructor. His ambition wasn’t just to teach the sport but to elevate it, integrating his father’s wisdom with his own unique insights.