MBTI UP Dance UP GirlGroup UP 🎵 Playlists 오늘의 운세
tripleS UP
Kim Yoo-yeon UP
Kim Chae-yeon Kotone Gong YuBin Joobin Kim Na-kyoung Kim Soo-min Jeong Ha-yeon Kim Chae-won Kwak Yeon-ji Kaede Yoon Seo-yeon JiYeon Lee Ji-woo

Kim Yoo-yeon

🎬 Watch videos

tripleS Kim YooYeon (S5) Profile — From Debut to Sub-Units and 2026 Updates

Kim YooYeon is the S5 member of the 24-member girl group tripleS. Born in February 2001, she is the oldest among all 24 members, earning her the title of "mad-eonni" (oldest sister) within the team. After narrowly missing the debut lineup on MBC's My Teenage Girl with an 8th-place finish, she was revealed as a member of tripleS in 2022. Since then, she has promoted across multiple sub-units, starting from the inaugural Acid Angel from Asia to her current unit, sun.

At a Glance

CategoryDetails
NameKim YooYeon (김유연)
Date of BirthFebruary 9, 2001; born in Seoul
Group NumberS5
Member RevealJuly 11, 2022 (5th member)
AgencyMODHAUS
First DebutOctober 28, 2022 with Acid Angel from Asia's "Generation"
Full-Group DebutFebruary 13, 2023 with ASSEMBLE title track "Rising"
Sub-UnitsAcid Angel from Asia, EVOLution, Visionary Vision, Hatchi!, Alphie, sun
EducationEwha Womans University, Dept. of Science Education (on leave of absence)

From 8th Place on My Teenage Girl to S5

Kim YooYeon first stepped into the public spotlight on the MBC audition show My Teenage Girl. Competing as a 4th-grade trainee, she survived all the way to the final episode in February 2022, finishing in 8th place—just shy of the debut lineup.

On July 11 of that year, tripleS unveiled her as their fifth member. tripleS assigns numbers to members as they are introduced one by one, determining sub-unit lineups through a fan-voting system known as "Gravity." In the inaugural vote, Kim YooYeon was chosen alongside Kim NaKyoung, Jeong HyeRin, and Gong YuBin to form the group's first sub-unit, Acid Angel from Asia (AAA).

AAA dropped their debut album ACCESS on October 28, 2022, at 6 PM, featuring the title track "Generation." The following year, on February 13, the group officially launched its full 10-member lineup with ASSEMBLE—and its lead single "Rising" was similarly chosen by fans, garnering around 57,000 votes.

Tracing Her Journey Through Sub-Units

tripleS continuously forms fresh unit combinations with every release. Looking just at the units featuring Kim YooYeon reveals an impressive lineup:

PeriodUnitKey Track · AlbumLineup
Oct 2022Acid Angel from Asia'Generation' / ACCESS4 members
Oct 2023EVOLution'Invincible' / ⟡(MUJUK)8 members
Oct 2024Visionary Vision (VV)'Hit The Floor' / Performante12 members, Leader Jeong HyeRin
Nov 2024Hatchi!'Untitled'8 members, Japan promo unit
Sep 2025AlphieWorld Tour 〈Alpha Percent〉8 members, tour unit
Nov 2025–presentsun (msnz)'Bubble Gum Girl' / Beyond Beauty6 members

EVOLution's "Invincible," produced by G-high, is a high-tech dance track that sings of an inner self that remains unbreakable like a diamond through any trial. VV's "Hit The Floor" blends a heavy hip-hop beat with boom bap and high-tech dance. Making good on showcase headlines that boldly declared they would "shatter the conventional 'girl group' mold," the team deliberately stepped away from typical female idol concepts.

Alphie was an eight-member unit formed specifically for the world tour 〈Alpha Percent〉, which kicked off in North America in September 2025. Kim YooYeon performed alongside Kotone, Nien, Lynn, Jeong HaYeon, Park ShiOn, Kim ChaeWon, and JiYeon.

Currently, Kim YooYeon is active in the unit sun. On November 24, 2025, tripleS released their mini-album Beyond Beauty, introducing four units at once—moon, sun, neptune, and zenith (collectively known as msnz). The sun lineup features Xinyu, Kim YooYeon, Mayu, Kim ChaeWon, Kim ChaeYeon, and Jeong HyeRin. The lead single "Bubble Gum Girl" sets a bubbly topline over the glossy "Frutiger Aero" aesthetic that was popular from the 2000s through the early 2010s.

Thoughts from the Oldest Member

At EVOLution's debut showcase in 2023, Kim YooYeon explained the fan-voted unit formation system:

"No member gets left out without being chosen by fans. Through the 'Dimension' system, every member gets the opportunity to participate in promotions."

A year later at the VV showcase, she remarked, "Even though we are half the full group, having 12 members generates an even stronger synergy," naming 'boyish,' 'high-tech dance,' and 'level up' as key concepts for the release. She also described herself as someone in the group whose "apologies come out in just one second." At the same showcase, Park SoHyun added, "Because our oldest sister YooYeon speaks up honestly when something goes wrong, the younger and middle members feel comfortable speaking their minds as well."

2026: Kim Yooyeon

  • February 4 — Attended the Kwak Hyun Joo Collection show at 2026 F/W Seoul Fashion Week, held at Dongdaemun Design Plaza (DDP) in Seoul. She stood on the photo wall alongside Xinyu and Jeong Hayeon.
  • June 1 — Released the full 24-member album ASSEMBLE26 LOVE & POP pt.1. Spanning seven tracks, including the title track "Baby Flower," the song comforts young girls navigating growing pains, reminding them that they all share the same struggles and encouraging them to bloom like flowers.
  • September 1 — Released sun's Japanese original single "DNA (Dream N Access)." It marked the second release in a serial project where the four msnz units dropped one Japanese track on the 1st of every month from August to November. On September 5, the six members of sun hosted a fan event in Tokyo.
  • September 19 — tripleS took home the "Global Hot Trend" award at the 2026 The Fact Music Awards, held at Busan Asiad Main Stadium. The award was determined by album and digital track performance (60%) and judges' evaluations (40%).
  • October 10–11 — Launched their new world tour, ANDLESS, as a complete 24-member lineup at Jangchung Gymnasium in Seoul. During the unit segment, sun performed a cover of TWICE's "CHEER UP," and the tour's namesake track, "Andless," was unveiled for the first time during the concert.
  • October 16 — Released the single ASSEMBLE26 LOVE&POP pt.2 featuring the title track "Andless." Lindgren, producer of "Takedown" from the Netflix soundtrack K-Pop: Demon Hunters, handled lyrics, composition, and arrangement. On October 22, all 24 members took to the stage together on Mnet's M Countdown.

Because all 24 members move across the stage simultaneously, you'll naturally find yourself seeking out individual member fancams to follow any single person's choreography.

Following Seoul, the tour headed to Macau on October 24 and Tokyo's Kanadevia Hall (formerly TOKYO DOME CITY HALL) on October 31. The Tokyo stop included two shows (afternoon and evening), billed as the group's first 24-member concert in Japan in one year and three months since July 2025. The North American leg stops in Toronto on November 11, New York on November 15, Chicago on November 18, Fort Worth on November 21, Los Angeles on November 24, and Vancouver on November 26. Some overseas outlets report the dates for New York, Los Angeles, and Vancouver a day or two off, so it is safest to cross-reference local ticketing notices. The final chapter of the series, LOVE&POP pt.3, is slated for release in January 2027 as their first Japanese studio album.

Frequently Asked Questions

How old is Kim Yooyeon?

Born on February 9, 2001, she is 25 years old as of November 2026. She is the oldest among the 24 members of tripleS.

Why is she S5?

tripleS assigns numbers in the order members are officially revealed. Kim Yooyeon was the fifth member to be introduced, on July 11, 2022.

Was she on 'My Teenage Girl'?

Yes. She competed as a Grade 4 contestant on the survival show and finished in 8th place overall.

What does "Ewha Goddess" mean?

It is a nickname frequently featured in news headlines referring to her enrollment as a science education major at Ewha Womans University. As of news reports in 2023, she had taken a leave of absence to concentrate on her idol career.

Which subunit is she in now?

She is in sun. The same six-member lineup from its 2025 debut also took part in the September 2026 Japanese single 'DNA (Dream N Access)'.

Does she have personal social media accounts?

Only the group's official channels are listed on their Linktree. There are no officially recognized personal accounts.

Verified Sources

Official Channels

Shared group channels listed on the official Linktree:

· Editorial policy ·

Keep exploring

More in this category

Parent category

tripleS

🗺 Map

KADERRA.NET About | Privacy Policy | Terms of Service | Contact