Mou Gou, a Qi native who ventured to Qin, ascended to Great General while commanding his namesake army and leading the Mou clan. As father to Mou Bu and adoptive guardian of Shou Hei Kun, he later mentored grandsons Mou Ten and Mou Ki. His towering stature exuded calm, marked by perpetually closed eyes and a flowing grey beard; his left arm lost in a climactic duel with Zhao’s Ren Pa. Renowned for methodical patience in warfare, he prioritized fortifications and calculated sieges, demanding his forces maintain a measured advance. This relaxed battlefield command contrasted sharply with his iron-fisted rule at home—he barred son Mou Bu from early battlefield exposure and refused Mou Ki’s pleas to join campaigns. To manage stress, he often infiltrated infantry ranks incognito, finding solace in anonymity. His career was etched by a lifelong rivalry with Zhao’s Ren Pa, first kindled during their youth in Qi. In Qin, he bolstered his strategic limitations by recruiting mavericks like Kan Ki and Ou Sen as deputies, harnessing their unorthodox brilliance to offset his own strategic boundaries. Achievements included seizing eleven Han cities within a month and directing the pivotal Sanyou Campaign against Wei, where he again clashed with Ren Pa. There, he entrusted fledgling commanders Shin and Mou Ten, gambling on their promise despite his cautious instincts. Sacrificing his left arm in their final confrontation, he secured triumph through Ou Sen’s decisive flanking maneuver. During the Coalition Invasion, Mou Gou spearheaded the defense of Kankoku Pass against Wei and Han armies, repelling repeated assaults to preserve Qin’s sovereignty. In twilight years, he grappled with his place in history, privately confessing envy toward Qin’s revered Six Great Generals. With final breaths, he implored Mou Ten and Shin to cultivate unity mirroring Qin’s legendary alliances. His peaceful death from age closed a military epoch, leaving Mou Bu to quietly reflect on their shared ascent. Mou Gou’s legacy endures through pragmatic stewardship, nurturing protégés like Ou Sen, and staunch defense against overwhelming odds. By blending commitment to traditional warfare with visionary recruitment, he became a pivotal architect bridging Qin’s martial heritage to its rising generation.