She transcribed Havel's texts and gained his trust. However, she no longer wanted to go to the Castle.

In 2026, Růžena Kulhánková recounted her friendship and collaboration with Václav Havel, which began when she moved to Rašínovo nábřeží in 1976. Initially friends with Ivan Havel, she became involved in the dissident movement, helping Havel by typing and editing his texts. Their relationship deepened over the years, especially during Havel's 50th birthday celebration in 1986. In 1988, they began working together on a computer, which was a new experience for both. Kulhánková also became a trusted courier for Havel, transporting sensitive documents and even an essay he prepared for an award in 1989. Despite the risks, she successfully delivered the essay after Havel was detained by the secret police. Their collaboration exemplified a blend of personal trust and political engagement.