Sima Yi

Sima Yi (司馬懿), style name: Zhongda (仲達), is a Three Kingdoms historical figure who was known to originally be a vassal to the Wei kingdom, helping his Lord Cao Cao in his ambitions as a very brilliant tactian. He then serves Cao Cao's son, Cao Pi. He served as the arch-nemesis of Zhuge Liang. However, it was often stated by Cao Cao that Sima Yi never had much intention of serving below someone, a fact that came to fruition during the aftermath of Zhuge Liang's Five Northern Campaigns against Wei when Sima Yi took control of the falling Wei empire, and went on to establish the foundation of the upcoming Jin dynasty.