 Among the roles written for her were those of Isoletta in Vincenzo Bellini's "La straniera" (1829, Milan), Gaetano Donizetti's "Parisina" (1833, Florence), Antonina in "Belisario" (1836, Venice), "Maria de Rudenz" (1838, Venice), and Bianca in Saverio Mercadante's "Le due illustre rivali" (1838, Venice).Unger had a great success at the Théâtre-Italien in Paris in October 1833, where Sadie speculates that this was the occasion upon which Rossini is known to have commented on her voice as having "the ardour of the south, the energy of the north, brazen lungs, a silver voice and a golden talent".In 1841 she married the French writer François Sabatier-Ungher and retired from the stage in 1843.