), was a queen consort of Balhae as the wife of King Mun (Dae Heum-mu).
Her existence is first known by the excavating of her tomb and tombstone in Ancient Tombs at Longtou Mountain, China.
[1] According to the Japanese history book Shoku Nihongi, King Mun's queen consort died in 776, but it is unknown whether the queen consort here refers to Hyoui or not.
In 2004–5, at least 14 tombs during the Balhae period were unearthed from the Longtou Mountain.
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