I Became the Villainess Demon Lord's Guardian Sword Spirit

Transmigrating as a legendary sword should've been epic—until Ning Chen realizes no destined hero is coming. Instead, his wielder is a ruthless reincarnated demon lord who lives for murder, arson, and chaos. Desperate to reclaim his human body, he's stuck playing babysitter-turned-system, dragging this bloodthirsty villainess kicking and screaming toward redemption. Her goal? Embrace villainy completely. His mission? Stop her at all costs. One sword spirit, one unrepentant demoness, and zero cooperation make for the world's most dysfunctional redemption arc.