Mitsuhide Akechi

Former general under Oda Nobunaga, Mitsuhide is famous for his betrayal the former master which led to Nobunaga's perishment. Naturally the animosity between Mitsuhide and Nobunaga that started on Earth did continue in the next realm of existence they've found themselves fighting as a Drifter and (in Mitsuhide's case) an End under the Black King's command.