Yuki is usually gentle, but can also be aloof and judgmental. She is also very smart, and goes after things at her own pace. She also likes to nap. Yuki used to be a stray cat living in a mountain village. When she first met Mayu, she was wary of her. However, the girl's kindness gradually made her open up, and she decided to stay with Mayu after learning that Mayu was going to leave the village.
Yuki transforms into Cure Nyammy.

(Source: Pretty Cure Wiki)