Qin Shi Huang

His real name is "Ying Zheng" (음정 에이세이, Eisei), with Qin Shi Huang or "Shi Huang Di" (짹짹 시작 황제, Shikōtei) being a title which literally means "First Emperor of Qin". He's the founder of the Qin widely regarded as the greatest emperor in all of Chinese history. He has also been referred to as "The King Where It All Began" (시작의 왕, Hajimari no Ō), the "King of Men" (사람의 왕, Hito no Ō) and "The Greatest King" (최고의 왕, Saikō no Ō) throughout his battle with Hades.