Hariclea Darclée "Roméo et Juliette" (Juliette); Jacques Halévy "La Juive" (Rachèle); Ruggero Leoncavallo "I Pagliacci" (Nedda) – opera interpreted in première for Romania at Bucharest National Theatre in 1903; Ruggero Leoncavallo "Zaza" (Zaza); Luigi Mancinelli "Hero e Leandro" (Hero) – opera composed for her voice and interpreted in prima assoluta at Madrid, in 1897; Pietro Mascagni "Cavalleria rusticana" (Santuzza) – oper interpreted in première for Romania at Bucharest National Theatre in 1891; Pietro Mascagni "L’amico Fritz" (Suzel) – opera interpreted in première for Teatro Della Pergole of Florence in 1891 and for Bucharest National Theatre in 1910; Pietro Mascagni "Iris" (Iris) –
Herva Nelli del destino", Puccini's "Tosca" (conducted by Eugene Ormandy), and "Un ballo in maschera". In 1951, Nelli reappeared with the New York City Opera, in "Cavalleria rusticana" again, as well as "Aida"; the next year, she portrayed Maddalena de Coigny in Giordano's "Andrea Chénier" (in Theodore Komisarjevsky's production). With the San Francisco Opera, in 1951 and 1952, the soprano sang in "Otello", "La forza del destino" (with Robert Weede), "Aida" (with Mario Del Monaco), "Cavalleria rusticana", "Il trovatore", and "La bohème" (this last on tour to Los Angeles); in 1957, she returned for "Un ballo in maschera". With the Baltimore Civic