Seo DaHyun (Hangul: 서다현) is the tenth revealed member of tripleS. She was officially revealed as S10 on December 9, 2022. Prior to her reveal, she released her own original soundtrack song, "I'm In Love With You", for the Korean Drama, Reborn Rich, on December 3, 2022.
DaHyun made her debut on February 13, 2023, with tripleS' debut mini album, ASSEMBLE, and the title track, “Rising”. She made her sub-unit debut on August 17, 2023, with LOVElution and the title track, “Girls' Capitalism”.
She is a member of the sub-unit, LOVElution and Neptune, and the leader of the sub-unit, Aria.
History[]
Early life[]
DaHyun was born as Seo DaHyun (서다현) on January 8, 2003 in Busan, South Korea. At some point in her teenage years while pursuing an idol career, she was accepted into Source Music and became a trainee there. It's speculated to have been around 2018-2019 as she featured as a background vocalist for GFRIEND's song, Hope, which was released in 2019 on the Fever Season mini. It is unknown when exactly she left Source Music but it is speculated to have been around mid to late 2021.
DaHyun joined MODHAUS in February of 2022 and remains until now, the trainee to have been a small s the longest.
2022: Reveal[]
On November 25, DaHyun was anonymously featured in SIGNAL #151, in which she was informed that she would be the 10th member and would be joining the other nine members in the upcoming full group debut. Two days later, on November 27, the sixth episode of Korean Drama, Reborn Rich aired, featuring an original soundtrack song accredited to DaHyun.[1]
DaHyun was officially announced as S10 on December 3, through the digital release of her OST. [2] Her teaser drop was released on December 5, followed by her introductory teaser on December 9. She moved into the HAUS on December 12.
2023: Debut with ASSEMBLE, LOVElution, U.S Tour & Aria preparations[]
On February 13, DaHyun made her official debut with tripleS' full group release, ASSEMBLE and the title track, "Rising". She participated in tripleS’ first pre-concert of the same name held on the same day. For her solo stage, DaHyun performed her OST "I'm In Love With You" live for the first time.
On April 25, DaHyun was determined as the fourth member of LOVElution through the Fourth Gravity vote.
On May 15, DaHyun was confirmed to release her second OST for the TV drama, Dr.Romantic 3.[3] On June 9, her OST, "More Than Yesterday", was released on streaming platforms.
On August 17, DaHyun made her official sub-unit debut with LOVElution and the title track, "Girls' Capitalism". DaHyun, Along with the rest of LOVElution, held their first overseas tour in the U.S.A from September 24 to October 14.
2024: Aria, King of Masked Singer participation, <Authentic> in Seoul[]
On January 15, DaHyun debuted as a member and leader of Aria with their single album, <Structure of Sadness>, and the title, "Door". On January 21, DaHyun was revealed to be a contestant on MBC's King of Masked Singer, however she was unfortunately eliminated.
Between February 3-4, She participated in the Seoul leg of the <Authentic> tour alongside LOVElution, EVOLution and NXT members.
On May 8, she made her comeback with tripleS' first studio album, ASSEMBLE24, and the title track, "Girls Never Die".
2025: tripleS Come True Tour, ASSEMBLE25, neptune debut[]
From January 11 to March 30, DaHyun participated in the tripleS Come True tour, together with SeoYeon, NaKyoung, Nien, JooBin, HaYeon, Sullin, and SeoAh.
On May 12, she made her comeback with tripleS' second studio album, ASSEMBLE25, and the title track, "깨어 (Are You Alive)".
On September 5, DaHyun was determined as a member of the sub-unit Neptune, through the msnz Grand Gravity. She debuted with this subunit on November 24 with the single "Fly Up" from the mini-album Beyond Beauty.
Discography Participation[]
Studio Albums[]
Mini Albums[]
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Single Albums[]
OSTs[]
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Original Soundtracks[]
- [2022.12.03] I'm In Love With You — Reborn Rich OST (2022)
- [2023.06.09] More Than Yesterday — Dr.Romantic 3 (2023)
- [2024.02.04] My Hope — Knight Flower OST (2024)
- [2024.12.27] First Night of Snow — Your Muse, My Goddess OST (2024)
- [2025.09.13] 쿵 — Bon Appetit Your Majesty OST (2025)
Filmography[]
| Year | Name | Network | Role |
|---|---|---|---|
| 2023 | Strong Girl: Badge War | 1theK Originals YouTube Channel | Herself |
| 2024 | King of Masked Singer | MBC | Contestant |
| Strong Girl: Badge War Season 2 | 1theK Originals YouTube Channel | Herself | |
| Chef’s Unexpected Landing: Hakka Kitchen | Hakka TV | Cameo (Ep. 1, 9) | |
| 2025 | Strong Girl: Badge War Season 3 | 1theK Originals YouTube Channel | Herself |
