Board Thread:Questions and Answers/@comment-29602226-20170204142209/@comment-29602226-20170412001820

I have remembered that the monsterization entry describes cursed items that grant Mamono powers but turn human beings into Incubi and Mamono over time. Those items change women into Mamonos of the species whose energy is inside the item...

One of the cursed items suggested would contain Yuki-onna DE and would grant the power to manipulate Ice. I guess that item would, over time, change a female user into a Yuki-onna.