Nekoyashiki Yuki is one of the four main cures in Wonderful Precure! Yuki's true form is of a cat; however she can transform into a human. As Cure Nyammy, she forms the Nyanderful Precure duo alongside her owner Mayu Nekoyashiki.

Yuki is gentle, yet aloof and judgmental. She is very smart, and teases Mayu about her lack of social skills.