Kook’s martial art journey started in 2008 when she trained Muay Thai in Bangkok. She spent almost 7 years with Muay Thai ;however, she felt it was not providing leverage for small people in a fight so she continued to look into other martial arts. She tried Aikido and Krav Maga but they are still not the right fit. While she turned to fitness and crossfit, a Mixed Martial Art gym opened in the same building with her fitness gym so she started boxing and mixed martial art training in 2015. Through mixed martial art, she discovered Brazilian Jiu-Jitsu and became a passionate practitioner. Kook received her black belt in 2025 from Professor Lee Livingstone.