Jenny o' the Woods - The Witcher 3

This vengeful wraith might very well have killed every last inhabitant of the village, had not a famous witcher, Geralt of Rivia, appeared in Velen - and been in need of a bit of coin.

So... That's to mean... our Zula's the wraith?
– Bolko, ealdorman of Midcopse

It is said true love's flame is never extinguished. This sad truth is the reason why Zula of Midcopse, whom an early death had separated from her beloved, was unable to find peace in the next life, and instead returned to haunt her former environs as a nightwraith.

Fighting such an apparition is extremely difficult. A nightwraith will form mirror images of herself to confuse her opponent and aid her in battle. She herself can take on immaterial form, rendering her invulnerable to blows. The best way to force her out of this state is to set a trap with the Yrden Sign, then quickly follow up with Igni while she is caught. Most important of all, however, is this: never attempt to fight one in the middle of the night, when the moon hangs high in the sky.