Around this time, she had been offered an education in Berlin, but her father did not support the idea of Gerster studying in Germany due to the growing influence of Nazism.

[1] In 1939, she was employed as a fairy tale narrator at the Nestlé Children's Paradise of the Swiss National Exposition [de].

[3] Her performance received wide acclaim, and in the following year she was employed by the National Swiss radio station SR DRS.

[4] She advocated for the abolition of nuclear power plants, the protection of trees, and supported initiatives related to cultural affairs.

[5] The Swiss actor and talk show moderator Viktor Giacobbo described her as a synonym for fairy tales in the Swiss-german region.