Lord Chunshen, recognized in the series as Shun Shin Kun, held the dual titles of Prime Minister and Head of Military Affairs for Chu, standing among the elite Four Lords of the Warring States. His two-decade tenure propelled Chu’s ascendancy as a regional power through deft political maneuvering and military command. When Qin’s expansion threatened neighboring realms, he spearheaded a five-state coalition as its commander-in-chief during the Coalition Invasion Arc, leveraging his strategic renown to unify rival leaders under his banner. The alliance besieged Qin’s Kankoku Pass, yet faltered after critical losses—including the death of Chu’s general Kan Mei—culminating in the coalition’s collapse. Stripped of authority and exiled by the Chu king for these defeats, Shun Shin Kun faced further peril during the Koku You Campaign Arc. Political rival Ri En, exploiting tensions over Chu’s succession crisis, dispatched assassins to eliminate him. Though retainers cautioned against complacency, Shun Shin Kun dismissed Ri En’s ruthlessness, a miscalibration that proved fatal as he navigated the kingdom’s fractious court dynamics. His death severed his grip on Chu’s political and military machinery. Noted for a brusque, acerbic temperament, he frequently rebuked subordinates with biting disdain. His strategic vision pierced long-term threats like Qin’s imperial hunger, yet rigid adherence to traditional alliances and indifference to court scheming left him vulnerable. This blend of tactical brilliance and political inflexibility sealed his legacy as both architect of Chu’s zenith and agent of its unraveling.