Hieda was born in Kanagawa Prefecture on January 15, 1997.[1][2] Her activities as a voice actress began in 2012, when she participated in a voice acting audition held by the talent agency 81 Produce. Out of 1,672 participants, she was selected as one of the 23 finalists, and received a Special Award as well as an award sponsored by the publishing company Shogakukan.[2]