Antonina is a lawyer and a graduate of the Belarusian State University. She worked as a legal adviser, notary, and chief specialist at the Ministry of Justice. Since 2002, she has been a member of the United Civil Party, serving on its executive committee and chairing the National Committee's Legal Affairs Commission for two years. In 2012, she was elected deputy chair of the party, a position she later resigned from.
Antonina was detained on July 27, 2022, as part of a criminal case opened under the article "organization and preparation of actions that grossly violate public order, or active participation in them."
According to the indictment, on August 23, 2020, she "publicly shouted slogans, loudly applauded, and stood on the roadway, thereby blocking and impeding the movement of public transport in Minsk, including the Minsktrans public transport system."
In November 2022, she was found guilty and sentenced to imprisonment.
In April 2023, Antonina was released, having fully served her court-appointed sentence.
