Waka Ninimiya is a wrestler for the BATTLE organization. She debuted in December of 2017, and has the nickname "Miss Perfect."

In her first year as a competitor, Ninomiya won the 2018 Extreme Tournament. However, in her title match she lost to Misa Suzumi, becoming the first Extreme Tournament winner to lose in her title match.

Extreme Tournament Champions
2014: Tsugumi Muto2015: Maria Wakatsuki2016: Yui Misaki2017: Misa Suzumi2018: Waka Ninomiya