Ruka Oshida is a minor character in Girls und Panzer, a series centered on the sport of tankery, where high school girls compete in armored warfare matches as a refined martial art. She is a student associated with the Anzio Girls' High School team and appears as part of the supporting cast. While not one of the main protagonists, she contributes to the school’s tankery presence and helps represent Anzio’s distinctive Italian-inspired style and cheerful competitive spirit.