She joined the Theatre de la Monnaie in Brussels from 1895 to 1897, and was the first to sing Guilhen in D'Indy's Fervaal (1897).

Other appearances by Raunay included roles in Tannhäuser, Faust, Fidelio, Iphigénie en Tauride, Hérodiade, and Lohengrin.

In 1923 and 1924 she gave joint recitals with pianist Marguerite Long, performing music by contemporary French composers such as Ravel, Debussy, and Fauré.

[6] She taught singing later in life; among her students was Jeanne Manceaux, the older sister of composer Francis Poulenc.

When Fauré's complete song cycle La chanson d'Ève was published in 1911, it was dedicated to Raunay, who had sung much of the work in its premiere performances.