Rugal Bernstein, known as Omega Rugal in his more formidable form, is a notorious villain in The King of Fighters series. He is a wealthy and powerful arms dealer with a penchant for collecting martial artists as trophies. As one of the primary antagonists, Rugal is infamous for his ruthlessness and overwhelming combat skills. He often serves as the final boss in the tournaments, utilizing his deadly Reppuken and Genocide Cutter techniques. Rugal's character embodies arrogance and a desire for power, making him a formidable and iconic adversary in the series.