The material available on Hyei (Park Hye Sung) is limited to the following confirmed facts: she is a Korean vocalist born on 12 August 1989, who served as leader and main vocalist of Ye-A (예아) and currently holds a main vocalist position in My-B (Ye-A). No chart data, release history, awards, or further narrative detail are present in the sourced material.
A fuller profile cannot be responsibly constructed from the available information. Below is what the material supports.
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Park Hye Sung, known by the stage name Hyei (혜이), has built her career around vocal work within the Korean group space, serving as leader and main vocalist of Ye-A (예아) before continuing as main vocalist in My-B (Ye-A). Beyond those roles, the public record available at this time does not yet support a more detailed account of her discography, chart history, or wider activities.
