I'll Make the Scumbags Cry Their Hearts Out

Upon her death, Ning Shu becomes a mission-taker who helps poor souls exact revenge on their behalf. She therefore jumps from one world to another, playing various roles and meeting various scumbags.
She snarls, "You scumbags, I'm only here to exact revenge. Don't be a hindrance, or I'll torture the hell out of anyone who obstructs me from completing the mission!"