Her father was a photographer who became a filmmaker in Brazil[1] after they immigrated in Eva's childhood.

Silent films featuring Eva Nil included Valadião, o Cratera (1925, "Valadião, the Crater", a short by Comello and his filmmaking partner Humberto Mauro), Na Primera da Vida (1925, "The Spring of Life", also by Mauro),[3] Senhorita Agora Mesmo (1928, "Miss Right Now", with Comello as cinematographer, producer, director, and actor), and Barro Humano (1929, by Adhemar Gonzaga).

She was counted among the melindrosas, modern young actresses of 1920s cinema in Brazil.

[5] In 1978, archival footage of Nil was featured in a documentary about women in film, Mulheres de Cinema.

[6] Eva Nil died in 1990, aged 81 years, in Cataguases, Minas Gerais, where she had lived for many years after retiring from film work.