In 1920 she graduated from high school in Lwów (new Second Polish Republic) and married a Zionist activist Natan (Nathan) Brystiger [1890-1932].

She created the so-called Committee of Political Prisoners, which helped the NKVD to imprison several members of the prewar Polish opposition movements.

Różańskis had committed "a crime" of accepting Western food-aid in the form of two kilograms of rice and a bag of flour from the Polish Government in Exile's embassy, in order to save their daughter from starvation.

A few years later, Józef Różański joined the NKVD and eventually, became a high ranking functionary in the Polish secret police.

In December 1944, after returning behind the Soviet front, Brystygier began working for the infamous Ministry of Public Security of Poland, where she soon got promoted to the rank of Director of the Fifth Department created in July 1946 specifically for the purpose of persecution and torture of Polish religious personalities.

One of her victims was a man named Szafarzyński – from the Olsztyn office of the Polish People's Party – who died as a result of interrogation carried out by Brystygier.

One of the victims of her interrogation methods testified later: "She is a murderous monster, worse than German female guards of the concentration camps".

She worked in a publishing house under Jewish communist Jerzy Borejsza (Różański's brother), and was a frequent visitor to a boarding school for the vision impaired, in a village near Warsaw.