[1] She is recognized as Righteous Among the Nations for her work to save Greek Jews during the Holocaust.

Ioanna Tsatsou, who lived in Athens, worked together with Archbishop Damaskinos to protect Jews in her community from the genocide.

She assisted Damaskinos in secretly "baptising" Greek Jews so they could obtain identity cards which said they were Christians.

[5] Tsatsou ran a program, created by Archbishop Damaskinos, which provided monetary assistance to the families of Greek men who had been executed or taken hostage while resisting occupation.

[5][9] In 1943, Tsatsou was interrogated by Italian forces who believed that Damaskinos was receiving money from the Middle East.

[10] Tsatsou wrote a book about her experience during the war, titled The Sword’s Fierce Edge: A Journal of the Occupation of Greece, 1941-1944.

She also translated some of her works into French,[11] for which she was awarded the Prix de la langue-française [fr] in 1976.