Huan Yi, known as Kan Ki in Japanese adaptations, commanded southern Qin's largest bandit gang—an army exclusively of criminals and outcasts infamous for crushing every Qin force dispatched to destroy them. His brutal methods earned him the epithet "The Beheader." Recruited by elderly Qin General Mou Gou, he rose to vice-general within the Mou Gou Army. There, his unorthodox tactics and mastery of psychological warfare secured major victories for Qin, even as his forces perpetrated atrocities including mass executions, rape, and the annihilation of civilian populations. His army operated with scant military protocol, prioritizing freedom under his command, and relied on terror tactics like dispatching mutilated corpses or sacks of eyeballs to enemy camps to shatter morale. Huan Yi's past was marked by a traumatic childhood within the Saki Clan, outcast children abused and scorned by elite society. The death of his lover, Shio, during this time ignited a profound rage against the world's injustices and the societal structures enabling such cruelty. This fury drove him to forge the Saki Clan into ruthless survivors and fundamentally shaped his approach to war. Despite his pervasive cruelty, he viewed the Saki Clan as his "sanctuary," displaying fierce loyalty to his inner circle—commanders like Ma Ron, Koku'Ou, and Rai Do—whom he treated as family. His complex persona featured crude sarcastic humor and an unnerving calmness even under mortal threat, as when held at swordpoint by Qiang Lei. As a strategist, Huan Yi specialized in high-stakes gambles exploiting psychological vulnerabilities. At the Battle of Heiyang, he abandoned a strategic hill to slaughter civilians from a Zhao village, displaying their mutilated bodies to General Ji Hui. This maneuver preyed on Ji Hui's emotional ties to his homeland, luring him from his post and securing Qin's victory. Such methods solidified Huan Yi's status as Qin's indispensable "pet monster"—tactically brilliant yet morally abhorrent. His actions starkly contradicted Qin's unification ideals, prompting King Zheng to issue an ultimatum after Huan Yi executed 100,000 surrendered Zhao soldiers: further atrocities meant death. Huan Yi ascended to Great General as the fifth member of the new Qin Six, a promotion recognizing his critical role in campaigns like the Western Zhao invasion. However, his dependence on extreme risk proved fatal at the Battle of Hika. Surrounded by Zhao forces under Li Mu and outmaneuvered through exposure of his "fatal flaw," he and his commanders perished in a final stand. Even defeated, he fought relentlessly until overwhelmed by spear wounds. Historically, his death occurred during Qin's assault on Zhao's capital, Handan, though the manga adapts this within Li Mu's counteroffensive. His legacy remained contentious: his tactical genius advanced Qin's expansion, yet his cruelty and disregard for Qin's long-term goals embodied the ethical cost of unification.