Tan Yuezhi commands as second-in-command of the resistance group the Luminaries, recognized as their deadliest combatant. He wields the Fu-Xi Zither, an artifact under his ownership and control, channeling his magical abilities in the fight against the Taibai Empire under the leadership of Xiang Chu. Amidst the resistance operations, a romantic relationship blossoms between Tan Yuezhi and fellow member Muyu Rou, culminating in a kiss witnessed by the Fu sisters one night, cementing their bond. His actions consistently support the Luminaries' objectives, strategically opposing the Taibai Empire's expansionist campaigns in an integral role throughout the conflict.