Genma Tobori

Born as Genma Yakou, he is the son of Akane Yakou and the older brother of Yukinobu Yakou. Genma was supposed to be the heir to the Yakou family. However Yukinobu was the greatest genius that the family had seen in centuries; at six years old he had even been able to walk in the air, the sign of a Xian. With his extreme talent Yukinobu was pushed above Genma in the Yakou succession. Genma was ordered by their mother Akane to be his brother's support, but Yukinobu vowed to be both the heir and the Black Chest in order to let his brother live the life he wanted. (Source: TYPE-MOON Wiki)