And here I thought the spirit was playing dirty before.
Didn't the shopkeeper say the city is plagued by a bunch of ruffians? I get the feeling it might be possible to solve the city's problems and give the spirit some satisfaction at the same time.
She wants revenge and I'm sure for a legit reason, but she ends uppissing off an isekai character as the first thing she does. She surly is unlucky as fuck.
Woman is angry random people ignored her suffering, thus she turned into a vengeful spirit. The vengeful spirit attacks and causes suffering to random people. Those random people in turn become spirits who are angry at spirits for causing them to suffer. Spirits cause suffering to spirits. All spirits are annihilated. Problem solved for all eternity.