Her father was the chef of King Albert I in Brussels. Besides going to school, she also sang in a band and after graduating, she studied arts. She went to live in France with her aunt and uncle, where she met and married the soldier, Joseph Knockaert. The marriage only lasted a year because Joseph died fighting in WWII while she was three months pregnant. Soon after, she organized the comical troupe Nani Brasso, La Lison and Les Chabris. They travelled worldwide presenting their show for three years. In 1951, she married Brasso and in 1953 they came to Brazil with a contract for Circo Garcia. There she became a very successful circus announcer due to her multiple outfit changes and fluency in many languages, which defined her unique style. Lison also worked as a circus announcer for a number of circuses such as Romano, Di Roma, Gordon, Berlin e Sarrasani until 1980. After fifty years living in Brazil, she and her friend Carola Boets, who also was an artist at Garcia, returned to Belgium, where Lison reunited with Carolus Leon van Reet, her boyfriend from her teenage years. In 1991, they got married in the Circo Federico Orfei, in São Paulo.