As a participant in the renowned Merola Opera Program, with the San Francisco Opera, Ms. Einfeld performed in The Medium by Gian-Carlo Menotti and Angelique by Jacques Ibert.
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While an Adler Fellow with San Francisco Opera, she performed many roles including Mascha in The Queen of Spades by Pyotr Ilyich Tchaikovsky, Papagena in The Magic Flute, Serpina in La Serva Padrona by Giovanni Battista Pergolesi, the title role in Rita by Gaetano Donizetti and Pauline in The Seagull.
Nikki Sinclaire | Nikki Webster | Nikki Sixx | Nikki Sudden | Nikki Reed | Nikki Payne | Nikki Kerkhof | Nikki Craft | Nikki Silva | Nikki Leonti | Nikki Grahame | Nikki Finke | Nikki Cox | Nikki | ''Tosa Nikki''　faithfully copied by Fujiwara no Teika | The Trials of Nikki Hill | The Best of Nikki Webster | Performance during ''Idol'', from left to right Nathalie Makoma, Charlene Meulenberg and Nikki Kerkhof | Nikki, Wild Dog of the North | Nikki Visser | Nikki van der Zyl | Nikki S. Lee | Nikki & Sara Live | Nikki McClure | Nikki Hornsby | Nikki Haley | Nikki Griffin | Nikki Gil | Nikki D | Nikki Coseteng |