Balalaika's uncle (バラライカの叔父 Bararaika no oji) is an unnamed Soviet marshal and the uncle of Balalaika.

He is an adult Russian man with a large build, pale skin, short blond hair, and a mustache. He wears a green Soviet marshal uniform consisting of a peaked cap, a military coat with one star on each golden epaulette, red fabric outlines, and brown gloves.

In 1976, while walking outside the Alexandrinsky Theatre in Leningrad, Russian SFSR, he conversed with his niece Balalaika about her future. Because her family reputation was stained by her father, her uncle recommended that she participate in the Olympics for the Soviet Union. He told his intrigued niece that she certainly had the skills for it. Hearing her wonder if she could truly restore her father's honor, he confirmed by nodding, but clarified that she needed some qualifications first before becoming an Olympic athlete. Subsequently, when Balalaika grew up, she enlisted in the Soviet Airborne Forces and became a paratrooper, eventually reaching the rank of captain. Nonetheless, she missed out on the opportunity to participate in the 1984 Los Angeles Summer Olympics due to her service in the Soviet-Afghan War. It is unknown if her uncle is still alive.