In politics, a defector is a person who gives up allegiance to one state in exchange for allegiance to another, changing sides in a way which is considered illegitimate by the first state. More broadly, defection involves abandoning a person, cause, or doctrine to which one is bound by some tie, as of allegiance or duty.

Nadia Elena Comăneci Conner is a Romanian retired gymnast. A five-time Olympic gold medalist, all in individual events, in 1976, at the age of 14, Comăneci was the first gymnast to be awarded a perfect score of 10.0 at the Olympic Games. At the same Games, she received six more perfect 10s for events en route to winning three gold medals. At the 1980 Summer Olympics in Moscow, she won two more gold medals and achieved two more perfect 10s. During her career, she won nine Olympic medals and four World Artistic Gymnastics Championship medals.