Tomb Raiding: The Clan Leader's Guardian

[The Grave Robbers' Chronicles fanfiction + plot-focused reactions + pairing undecided] Zhang Xuanyue had known since birth that her mission was to protect Zhang Qiling until the end of her life. But she refused to accept it. Why should she have to tie her whole life to one person? Just because she was that so-called clan leader? So she ran away when Zhang Qiling was born. She spent over a hundred years living it up out in the world. Then one day, someone told her how hard and miserable Zhang Qiling's life had been all these years because of her. She hadn't wanted to get involved, but she couldn't beat him. So she looked into Zhang Qiling's experiences over the years, only to discover things were even worse than he'd told her. Zhang Xuanyue accepted her fate and began protecting Zhang Qiling from time to time, out of a sense of duty, while earning a little extra on the side. And so, a female demon who would blow people's heads off at the drop of a hat appeared in the underworld.