Ahn So Hyeon, known professionally as Soo, is a South Korean singer, dancer, and former member of TAHITI (타히티) and 3PIECE (쓰리피스; formerly known as ONAIR). She graduated from Ahyeon Industrial Information School.

She made her debut in June 2014, using the stage name Jerry, when she joined TAHITI as their new main vocalist with their third single album, "Oppa, You're Mine". The group had debuted in July 2012 but quickly faced a lack of promotional activities and several lineup changes. J-Line Entertainment (제이라인엔터테인먼트; formerly known as Dream Star Entertainment) decided to add her to the group. Unfortunately, after a few more releases, the group had prolonged periods of inactivity and eventually disbanded in July 2018.

She then made her debut as a solo artist in December 2019 with the single album "Come Back Again" and used the stage name ANSO.

She then joined pre-debut group ONAIR in November 2022 and began a live tour in Japan for several weeks before debuting in South Korea. In January 2023, SW Entertainment (SW 엔터테인먼트) took control of the group and began thinking about rebranding. They briefly changed the group's name to ST ONAIR in March of that year, but it reverted back to ONAIR shortly after. However, their debut kept being delayed by the agency, and several lineup changes caused further postponements. In March 2024, SW announced the group's name was officially changing to 3PIECE.

She finally re-debuted in August 2024, now using the stage name Soo, as 3PIECE's vocalist with their first digital single, "Summer Feeling". However, the group became inactive after the release of their second digital single, "Light Up", in October of that year. In June 2025, she confirmed 3PIECE had quietly disbanded.

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