Movie
Description
Nyakkii Momoyama is a pink anthropomorphic Persian cat with a beige face. She features pointy ears showcasing lighter inner ears, a distinctive forehead tuft, a white muzzle, and a brown nose. Her standard attire includes a light grey long-sleeved shirt under a purple vest, turquoise shorts, purple sneakers, and white socks adorned with pastel purple stripes. Summer sees her in a white t-shirt with purple stripes, a dark blue denim skirt, and shorter white socks. She occasionally accessorizes with a brown cowboy hat. Prior to episode 13 of her debut series, she wore a yellow and grey long-sleeved dress with light grey shorts underneath and black flats.

Nyakkii is characterized as a hard worker possessing a sensitive side and tomboyish traits. She exhibits a competitive spirit and intensely dislikes losing, often reacting emotionally to defeat. She demonstrates resilience against bullying, particularly from Zouta Ikeno, actively standing up against such behavior, blending toughness in confronting challenges with emotional vulnerability in difficult situations.

As a kindergartner at Challenge Kindergarten, Nyakkii maintains friendships with Shimajiro Shimano, Mimirin Midorihara, Torippii Sorano, Kikko Hayashida, and Zouta Ikeno. Her relationship with Zouta involves conflict due to his bullying tendencies, which she resists. Shared interests, notably sports proficiency, form the basis of her friendship with Shimajiro.

Her name carries specific meanings: "Momoyama" combines "momo" (peach) and "yama" (mountain), while "Nyakkii" derives from "nya" (a cat's meow sound) and "ki" (yellow).

Her birthday is April 4, making her zodiac sign Aries. She shares this birthday with Hana Shimano and Gao-Gao. Her blood type is A. She favors grapes as her preferred food and excels at sports, though swimming is a noted weakness. Her interests include jump-roping and tree-climbing. She shows aversion to both hot environments and cold places.

Nyakkii serves as a replacement for the character Ramurin, first appearing in the Wow! series installment.