[2] Her father, a manager at a soap factory, had immigrated to Argentina from the Russian Empire to escape anti-Semitism and poverty through the sponsorship of philanthropist and banker Maurice de Hirsch.
She then passed the examinations for the actors' union and became a member, playing with the star Miryam Karalova-Kambarov, then Moyshe Oysher and Florence Weiss, and finally in serious drama roles with Zygmunt Turkow in Urteyl, Hirsh Lekert, Ivan Kruger and Di glokn-tsier fun Notr-dam (The Bell-ringer (Hunchback) of Notre Dame).
[3] Lerer played with Yakov Ben-Ami and Bertha Kalich in Friedrich Wolf's Profesor Mamlok, Strindberg's Der Foter, and H. Leivick's Der poet is blind gevorn (The poet became blind); with Samuel (Hymie) Goldenberg in Kalmanovich's Hayntike kinder (Kids these days); and with Maurice Schwartz in Singer's Moyshe Kalb.
Her first performance was in Fun Niu York keyn Berlin; she then toured concertizing at places like the Arbeter Ring, the National Yiddish Workers Union, and Camp Boyberik.
In 1952, she participated in Herman Yablokoff's production of Benyomin Ressler's Onkl Sem in yisroel (Uncle Sam in Israel) in the Public Theater in New York.