In de Beauvoir's first novel L'Invitée, she and her sister, Wanda, were fused together to make the character of the younger friend Xavière, to form with the actress Françoise and the actor, director Pierre a ménage à trois.
[1] Olga, along with Bianca Lamblin and Natalie Sorokin, later stated that their "trio" relationships with Sartre and de Beauvoir damaged them psychologically.
The Flies should have premiered at the Comédie-Française, but the intendant Jean-Louis Barrault did not agree to Sartre's condition that Olga Kosakiewicz should assume the role of Electra.
In 1946 in Simone de Beauvoir's unique Drama Les Bouches inutiles she played Clarice the daughter of Catherine and Louis d'Avesnes the main characters.
In Sartre's trilogy of novels, Les Chemins de la Liberté (The Roads to Freedom), the character of Ivich is considered a representation of Olga.