Tchachina began training at the age of six in her hometown of Omsk (also the hometown of Galima Shugurova, Evgenia Kanaeva, Tatiana Druchinina, Ksenia Dudkina, Sofya Skomorokh). After she became impressed watching the World Rhythmic Gymnastics Championships on television, her grandfather, a devoted amateur sportsman, took her to a sports school. Her early days were filled with music lessons, swimming and rhythmic gymnastics. Faced with a choice at age 11, she chose gymnastics. She was coached by Vera Shtelbaums and her daughter Elena Arais since the age of five. Her favourite gymnasts are Olena Vitrychenko and Yanina Batyrchina.