Rosenfeld was born on March 21, 1987, in New York City, New York, and became a voice actress as an adult. She started to provide voices for the Pokémon anime during the thirteenth season. Her first major roles were the Nurse Joys of the Unova region as well as their Audino. In Pokémon the Series: XY, she received the role of voicing Bonnie, Clemont's younger sister and one of Ash's traveling companions. In Pokémon the Series: Sun & Moon, she voiced Ash's classmate Sophocles, as well as Mallow's Tsareena.