A cursed corpse. A full of resentment victim and someone who decided to continue to cling to their remaining life. It's not the same way as reanimation from the Necromancer's spells but it is pretty close to that.
"When did this happen? It seems to look like it's pretty recent," I asked as the wife seems to look like it didn't rot at all.
"It's been 50 years since she rose up from the dead and decided to guard her husband's corpse. I tried to defeat her but it didn't work as it turns out, she is immune to ice and she is pretty defensive. She covers a little bit of the area I once controlled before making it harder for me to even deal with. Since you hunt monsters, I can tell you will be capable of getting rid of that monster quickly?" Yuki-Onna looked at me with an expectation that I will deliver on that.
"I can certainly try but don't expect too much from my abilities to immediately kill the monster."