Sister of Cynara, Cybele, and Cylene (of the Quarteto em Cy, she being the only one to have participated in all of the group's formations), Cyva performed as a singer and actress in the show A Hora da Criança on the Rádio Sociedade da Bahia (Salvador), from 1950 to 1957. Graduating with a degree in literature, she worked as a teacher in Salvador for two years before moving to Rio de Janeiro, where she continued to teach. In 1962 Cyva started as an amateur singer on Renato Murce's Papel Carbono show, forming a duo with her sister Cybele in the same year. In 1963 she recorded with her sisters a soundtrack written by Pixinguinha and Vinícius de Moraes for the film Sol Sobre a Lama (Alex Viany). Along with her activities in the Quarteto, she was the musical director of the Brazilian versions of several films by Walt Disney. She also wrote the musical Mar de Janeiro (1987), which had a soundtrack by Sivuca and Paulinho Tapajós.