She was known for her unusually high and resonant soprano voice and was regarded as one of the leading forces of the Danish opera during the first half of the 19th century.

[2] In April 1816, she made her debut at the Royal Danish Theatre as Charlotte in a production of Christoph Ernst Friedrich Weyse's Sovedrikken.

[1] Here other roles as royal actress included Sidi in Lulu, Isabella in Robert af Normandiet, Rosina in The Barber of Seville, and Queen of the Erdgeister in Hans Heiling.

[4] She made her last theatrical appearance in February 1845, reprising her role as Wilhemine in Ungdom og Galskap.

Her father, Fraz Anton Xaverius Zrza (1761–1843), was an oboist, french horn player, and court violinist who had immigrated to Denmark from Moravia.