TripleS NEW BALLAD DIMENSION Members Profile 2026: Bio, Age & Interesting Facts
In the ever-expanding universe of K-pop, few groups have redefined the concept of a “girl group” quite like tripleS. Known for their unique “dimension” system, where subunits are formed through fan voting, tripleS has consistently pushed the boundaries of what is possible in the industry. One of their most beloved and artistically significant creations is the NEW BALLAD DIMENSION-officially known as Aria-the group’s first-ever vocal-focused ballad subunit.
TripleS NEW BALLAD DIMENSION (Aria) is the first ballad-focused subunit of the K-pop girl group tripleS, formed through fan voting in November 2023. The five members are Seo DaHyun (leader/main vocalist), Nien (sub vocalist), Kim ChaeYeon (sub vocalist), Lee JiWoo (main vocalist), and Kaede (lead vocalist/maknae) . They debuted in January 2024 with the single “Door,” with lyrics by Heize
Debuted in January 2024, Aria represents a departure from the energetic dance-pop that typically defines K-pop girl groups. Instead, this five-member unit focuses on emotional storytelling through powerful vocals, heartfelt lyrics, and sophisticated musical arrangements. The unit’s formation was entirely determined by fans through the “Ballad Dimension Gravity” voting system, making it a truly democratic creation.
The members of Aria-Seo DaHyun, Nien, Kim ChaeYeon, Lee JiWoo, and Kaede– were selected for their exceptional vocal abilities. Each brings a unique color and texture to the group’s sound, creating harmonies that have captivated listeners worldwide. Their debut single “Door,” with lyrics written by acclaimed singer-songwriter Heize, showcased the unit’s emotional depth and musical sophistication.
This comprehensive tripleS NEW BALLAD DIMENSION members profile will take you through everything you need to know about Aria in 2026. From detailed individual member biographies to their discography, achievements, and fascinating facts, this guide is your ultimate resource for understanding why this ballad dimension remains one of tripleS’s most cherished subunits.
Quick Facts Table
Table of Contents
Who Is tripleS NEW BALLAD DIMENSION (Aria)?
Aria (Hangul: 아리아) is the first ballad subunit of the South Korean girl group tripleS. Formed through the “Grand Gravity: Ballad Dimension” fan voting system in November 2023, the unit consists of five members selected for their exceptional vocal abilities: Seo DaHyun, Nien, Kim ChaeYeon, Lee JiWoo, and Kaede.
The name “Aria” was chosen by fans through a separate “Event Gravity” where they voted on nine suggested names. An aria is a self-contained piece for one voice in an opera, typically showcasing the singer’s virtuosity-a fitting name for a unit focused on vocal excellence.
Aria represents a unique concept within the tripleS ecosystem. While other dimensions focus on dance, performance, or specific musical genres, Aria is dedicated entirely to emotional storytelling through music. Their songs are characterized by lush harmonies, heartfelt lyrics, and sophisticated arrangements that highlight each member’s vocal color.
The unit made their debut in January 2024 with the single “Door,” a sentimental love song with lyrics written by renowned soloist Heize. The music video and performances showcased the members’ emotional delivery and vocal prowess, establishing Aria as a unique and important part of the tripleS discography.
Group History
Formation and Pre-Debut
The story of Aria began on November 18, 2023, when tripleS announced their ninth gravity, titled “Grand Gravity: Ballad Dimension” . This voting event was designed to determine the five members who would form the group’s first-ever ballad-focused subunit.
The gravity operated on a unique system. Seo DaHyun was pre-selected by MODHAUS staff as a guaranteed member, recognizing her exceptional main vocalist abilities. A live draw was held on November 21 to create seven combinations of members that fans could vote for. From November 22 to 24, fans worldwide cast their votes.
Combination D– consisting of Lee JiWoo, Kim ChaeYeon, Nien, and Kaede– emerged victorious. Together with pre-selected member Seo DaHyun, these five formed the lineup of the ballad dimension.
From November 28 to 30, a tenth gravity was held to determine the unit’s official name. MODHAUS had previously opened a pre-gravity channel in their official Discord server for fans to submit name suggestions. From nine finalists, “Aria” was chosen as the unit’s name on November 30.
Official Debut
Aria made their official debut in January 2024. The unit began recording their debut track at the MonoTree studio, as shown in SIGNAL #408. On December 12, 2023, it was reported that soloist Heize had written the lyrics for Aria’s debut song.
The debut single, “Door,” is an emotional love song that showcases the unit’s vocal capabilities. The music video was filmed during SIGNAL #416. A statement on December 28 confirmed that Aria’s debut would include a limited edition release of platform or QR albums and that they would have a brief broadcasting period.
Recent Activities (2024-2026)
Following their debut, the members of Aria have continued to be active both as a unit and within other tripleS subunits.
2024: Aria promoted their debut single “Door” and participated in various tripleS activities. The unit’s formation was celebrated as a milestone in tripleS’s history, demonstrating the power of fan participation in shaping the group’s direction.
2025-2026: While specific Aria unit activities in 2025-2026 are less documented, all five members have remained active within the larger tripleS ecosystem. They have participated in full-group projects, including the ASSEMBLE26 ‘LOVE & POP’ series. The members have also been active in other subunits, showcasing their versatility as artists.
In 2026, tripleS continued their ambitious ASSEMBLE26 project, releasing full-group albums that include all 24 members. The members of Aria have been integral to these releases, contributing their vocal talents to the group’s diverse sound.
Agency and Management
Aria is managed by MODHAUS, the entertainment company founded by Jaden Jeong, a former creative director at Blockberry Creative (known for LOONA). MODHAUS launched tripleS in May 2022 as its first girl group.
MODHAUS is known for its innovative approach to K-pop, particularly the “dimension” system where subunits are formed through fan voting. This democratic approach to group formation has been a hallmark of tripleS’s identity and has fostered a strong connection between the group and their fans, known as WAV.
The agency has also embraced blockchain technology and NFT integration as part of their business model, allowing fans to participate in decision-making through the purchase of digital assets called “COMO”.
Member Profiles
Seo DaHyun (서다현) Profile
Personal Information
| Category | Details |
|---|---|
| Full Name | Seo DaHyun (서다현) |
| Stage Name | DaHyun (다현) |
| Date of Birth | January 8, 2003 |
| Age | 23 years old (as of 2026) |
| Zodiac Sign | Capricorn |
| Chinese Zodiac | Goat (2003 is Year of the Goat) |
| Birthplace | Busan, South Korea |
| Nationality | South Korean |
| Height | 159.8 cm (5’3″) |
| Weight | This information is not publicly available |
| Blood Type | This information is not publicly available |
| MBTI Type | This information is not publicly available |
Group Role
| Category | Details |
|---|---|
| Position | Leader, Main Vocalist |
| Member Number | S10 |
| Training Period | Pre-selected by MODHAUS staff for Ballad Dimension |
Early Life and Education
Seo DaHyun was born on January 8, 2003, in Busan, South Korea. She attended Hanlim Multi Art School as a student of the Applied Music Department and graduated prior to her debut in tripleS.
DaHyun was introduced as the 10th member of tripleS through the release of the original soundtrack “I’m In Love You” for a Korean drama series.
Career Journey
Pre-Debut Activities: Before joining tripleS, DaHyun was a hidden trainee. She was introduced to the public through the OST release “I’m In Love You,” which served as her debut showcase.
Debut with tripleS: DaHyun made her official debut with tripleS on February 13, 2023, with the group’s first mini-album, ASSEMBLE, and the title track “Rising”.
Subunit Activities:
- LOVElution: DaHyun is a member of tripleS’s third subunit, LOVElution, which debuted on August 17, 2023, with the mini-album MUHAN and the title track “Girls’ Capitalism”.
- Aria: She was pre-selected by MODHAUS staff as a guaranteed member of the ballad dimension. As the leader and main vocalist of Aria, she has been instrumental in shaping the unit’s sound.
- Neptune: DaHyun is also a member of the subunit Neptune.
Recent Activities (2025-2026): DaHyun has continued to be active with tripleS, participating in full-group projects including the ASSEMBLE26 ‘LOVE & POP’ series. She has also been active with her various subunits.
Family Background
This information is not publicly available.
Relationship Status
As of 2026, Seo DaHyun’s relationship status is not publicly available. Like most K-pop idols, she keeps her personal life private.
Net Worth
This information is not publicly available. As a member of tripleS and multiple subunits, DaHyun’s income comes from album sales, streaming, concerts, and other activities. However, exact figures have not been disclosed.
Social Media Profiles
- Instagram: @seodahyun_official (Note: Please verify)
- Weverse: tripleS official channel
Interesting Facts About Seo DaHyun
- She was the 10th member revealed for tripleS.
- She was pre-selected by MODHAUS staff for the Ballad Dimension.
- She is the leader of Aria.
- She attended Hanlim Multi Art School.
- Her nickname is “Soda”.
- She is known for being one of tripleS’s strongest vocalists.
- She debuted through an OST before joining tripleS.
- She is a member of three tripleS subunits: LOVElution, Aria, and Neptune.
Nien (니엔) Profile
Personal Information
| Category | Details |
|---|---|
| Full Name | Hsü Nien-tz’u (許念慈) |
| Korean Name | Nien (니엔) |
| Stage Name | Nien |
| Date of Birth | June 2, 2003 |
| Age | 23 years old (as of 2026) |
| Zodiac Sign | Gemini |
| Chinese Zodiac | Goat (2003 is Year of the Goat) |
| Birthplace | Taipei, Taiwan |
| Nationality | Taiwanese-Vietnamese |
| Height | 169 cm (5’6″/5’7″) |
| Weight | This information is not publicly available |
| Blood Type | O |
| MBTI Type | ESFP |
Group Role
Early Life and Education
Nien was born as Hsü Nien-tz’u on June 2, 2003, in Taipei, Taiwan. Her father is Taiwanese, and her mother is Vietnamese. She grew up in a multicultural household, speaking multiple languages.
Career Journey
Pre-Debut Activities: Before joining tripleS, Nien participated in the survival show Girls Planet 999 as a member of the Chinese group of trainees. She was eliminated in the show’s second elimination round.
Debut with tripleS: Nien was revealed as the 13th member of tripleS on March 21, 2023. She made her official debut with tripleS on February 13, 2023, with the mini-album ASSEMBLE.
Subunit Activities:
- LOVElution: Nien made her subunit debut in tripleS’s third subunit, LOVElution, on August 17, 2023, with the mini-album MUHAN and the title track “Girls’ Capitalism”.
- Aria: She was selected for the ballad dimension through the Grand Gravity, as part of the winning Combination D.
Recent Activities (2025-2026): Nien has continued to be active with tripleS and its various subunits. In 2026, she participated in the full-group ASSEMBLE26 ‘LOVE & POP’ project.
Family Background
Nien’s father is Taiwanese, and her mother is Vietnamese. She has spoken about her multicultural background and how it has shaped her identity.
Relationship Status
As of 2026, Nien’s relationship status is not publicly available.
Net Worth
This information is not publicly available.
Social Media Profiles
- Instagram: @nien_0602 (Note: Please verify)
- Weverse: tripleS official channel
Interesting Facts About Nien
- She is of Taiwanese-Vietnamese descent.
- She participated in Girls Planet 999 before joining tripleS.
- She was the 13th member revealed for tripleS.
- She is known as the group’s “Vitamin N” due to her extroverted personality.
- She considers herself the unofficial photographer of tripleS.
- Her special skills include cracking her joints and speaking Vietnamese.
- She has an ‘extreme E’ (extroverted) personality.
- Her hobbies include watching dramas.
Kim ChaeYeon (김채연) Profile
Personal Information
| Category | Details |
|---|---|
| Full Name | Kim ChaeYeon (김채연) |
| Stage Name | ChaeYeon (채연) |
| Date of Birth | December 4, 2004 |
| Age | 21 years old (as of 2026) |
| Zodiac Sign | Sagittarius |
| Chinese Zodiac | Monkey (2004 is Year of the Monkey) |
| Birthplace | Mia-dong, Gangbuk-gu, Seoul, South Korea |
| Nationality | South Korean |
| Height | 170 cm (5’6″/5’7″) |
| Weight | 52 kg (114 lbs) |
| Blood Type | B |
| MBTI Type | ESFP-A |
Group Role
Early Life and Education
Kim ChaeYeon was born on December 4, 2004, in Mia-dong, Gangbuk-gu, Seoul, South Korea. She began her entertainment career at a young age, joining the children’s group Busters in 2017.
Career Journey
Pre-Debut Activities: ChaeYeon debuted as a member of the children’s group Busters on November 27, 2017. She promoted with Busters until the group went on hiatus.
Joining tripleS: On June 16, 2022, ChaeYeon was revealed as the fourth member of tripleS. She joined MODHAUS following the hiatus of Busters.
Debut with tripleS: She made her official debut with tripleS on February 13, 2023, with the mini-album ASSEMBLE.
Subunit Activities:
- +(KR)ystal Eyes: ChaeYeon is a member of this subunit.
- EVOLution: She is a member of this subunit.
- Aria: She was selected for the ballad dimension through the Grand Gravity, as part of the winning Combination D.
- ∞! (Infinity): She is a member of this subunit.
- ACID EYES: She is a member of this subunit.
Recent Activities (2025-2026): ChaeYeon has remained active with tripleS, participating in full-group projects and various subunit activities. In 2026, she participated in the ASSEMBLE26 ‘LOVE & POP’ project.
Family Background
This information is not publicly available.
Relationship Status
As of 2026, Kim ChaeYeon’s relationship status is not publicly available.
Net Worth
This information is not publicly available.
Social Media Profiles
- Instagram: @chaeyeon_1204 (Note: Please verify)
- Weverse: tripleS official channel
Interesting Facts About Kim ChaeYeon
- She debuted as a member of Busters in 2017.
- She was the fourth member revealed for tripleS.
- Her nickname is “Chaeyommi”.
- She is a member of five tripleS subunits.
- Her specialties include acting and MC-ing.
- Her favorite characters include Apeach, Hello Kitty, and My Melody.
- Her MBTI type is ESFP-A.
- She was a contestant on Girls Planet 999 alongside Nien.
Lee JiWoo (이지우) Profile
Personal Information
| Category | Details |
|---|---|
| Full Name | Lee JiWoo (이지우) |
| Stage Name | JiWoo (지우) |
| Date of Birth | October 24, 2005 |
| Age | 20 years old (as of 2026) |
| Zodiac Sign | Scorpio |
| Chinese Zodiac | Rooster (2005 is Year of the Rooster) |
| Birthplace | Gangnam-gu, Seoul, South Korea |
| Nationality | South Korean |
| Height | 172 cm (5’7″/5’8″) |
| Weight | 48 kg (105 lbs/106 lbs) |
| Blood Type | This information is not publicly available |
| MBTI Type | INFP / INTP |
Group Role
Early Life and Education
Lee JiWoo was born on October 24, 2005, in Gangnam-gu, Seoul, South Korea. She was the third member revealed for tripleS. Before joining tripleS, she trained at multiple agencies.
Career Journey
Pre-Debut Activities: Before joining tripleS, JiWoo was a trainee at various entertainment companies. She was the fourth youngest 3rd grade contestant on the show My Teenage Girl (MTG).
Debut with tripleS: JiWoo was announced as the third member of tripleS. She made her official debut with tripleS on February 13, 2023, with the mini-album ASSEMBLE.
Subunit Activities:
- +(KR)ystal Eyes: JiWoo is a member of this subunit.
- ACID EYES: She is a member of this subunit.
- EVOLution: She is a member of this subunit, serving as Co-Leader.
- Aria: She was selected for the ballad dimension through the Grand Gravity, as part of the winning Combination D.
- Hatchi: She is a member of this subunit.
- Zenith: She is a member of this subunit.
Recent Activities (2025-2026): JiWoo has continued to be active with tripleS and its various subunits. In 2026, she participated in the full-group ASSEMBLE26 ‘LOVE & POP’ project.
Family Background
This information is not publicly available.
Relationship Status
As of 2026, Lee JiWoo’s relationship status is not publicly available.
Net Worth
This information is not publicly available.
Social Media Profiles
- Instagram: @jiwoo_1024 (Note: Please verify)
- Weverse: tripleS official channel
Interesting Facts About Lee JiWoo
- She was the third member revealed for tripleS.
- Her nickname is “Baby JiWoo”.
- She is a main vocalist in multiple subunits.
- She is the Co-Leader of EVOLution.
- She participated in My Teenage Girl (MTG).
- She is a member of six tripleS subunits.
- Her hobbies include baking and watching movies.
- Her MBTI type is INFP (previously).
Kaede (카에데) Profile
Personal Information
| Category | Details |
|---|---|
| Full Name | Yamada Kaede (山田楓) |
| Korean Name | Kim AhReum (김아름) |
| Stage Name | Kaede (카에데) |
| Date of Birth | December 20, 2005 |
| Age | 20 years old (as of 2026) |
| Zodiac Sign | Sagittarius |
| Chinese Zodiac | Rooster (2005 is Year of the Rooster) |
| Birthplace | Toyama, Toyama Prefecture, Japan |
| Nationality | Japanese |
| Height | 160 cm (5’3″) |
| Weight | This information is not publicly available |
| Blood Type | A |
| MBTI Type | INFP |
Group Role
Early Life and Education
Kaede was born as Yamada Kaede on December 20, 2005, in Toyama, Toyama Prefecture, Japan. Before joining tripleS, she worked as a child model under Asia Promotion.
Career Journey
Pre-Debut Activities: Prior to joining tripleS, Kaede was a child model in Japan. She is the first Japanese and also first foreign member of tripleS.
Debut with tripleS: Kaede made her official debut with tripleS on February 13, 2023, with the mini-album ASSEMBLE and the title track “Rising”.
Subunit Activities:
- LOVElution: Kaede is a member of tripleS’s third subunit, LOVElution.
- Aria: She was selected for the ballad dimension through the Grand Gravity, as part of the winning Combination D.
Recent Activities (2025-2026): Kaede has continued to be active with tripleS and its various subunits. In 2026, she participated in the full-group ASSEMBLE26 ‘LOVE & POP’ project.
Family Background
This information is not publicly available.
Relationship Status
As of 2026, Kaede’s relationship status is not publicly available.
Net Worth
This information is not publicly available.
Social Media Profiles
- Instagram: @kaede_1220 (Note: Please verify)
- Weverse: tripleS official channel
Interesting Facts About Kaede
- She is the first Japanese and first foreign member of tripleS.
- Her Korean name is Kim AhReum (김아름).
- She was a child model before joining tripleS.
- She is the maknae (youngest) of Aria.
- Her hobbies include playing games and watching horror movies.
- Her favorite foods include bossam and pork belly.
- She is from Toyama, Japan.
- Her Chinese zodiac sign is a Rooster.
Former Members
Aria has no former members. The unit has maintained the same five-member lineup since their debut in January 2024.
Discography
Singles
| Single | Details |
|---|---|
| “Door” | Debut single (January 2024); lyrics by Heize |
Other Releases
| Release | Details |
|---|---|
| Various full-group tripleS albums | Members participate as part of tripleS |
Note: Aria’s discography is limited as a specialized ballad unit. Members have also released music through other tripleS subunits and full-group projects.
Music Style and Influence
Musical Identity
Aria is defined by their emotional ballad sound. Unlike other tripleS dimensions that focus on dance-pop or energetic concepts, Aria emphasizes vocal excellence and emotional storytelling.
Concepts
The unit’s concept revolves around sentimental and heartfelt music. Their debut single “Door” is described as an emotional love song. The group’s visual concept for “Door” featured a “cut” concept that highlighted each member’s individuality and charm.
Artistic Evolution
As tripleS’s first ballad dimension, Aria represents an important artistic direction for the group. The unit demonstrates the versatility of tripleS’s members and the group’s ability to excel across multiple genres.
Influences
The lyrics for Aria’s debut single “Door” were written by Heize, a renowned Korean soloist known for her emotional and introspective music. This collaboration reflects the unit’s commitment to musical sophistication and emotional depth.
Awards and Achievements
Tours and Concerts
| Event | Details |
|---|---|
| tripleS Full-Group Concerts | Members participate as part of tripleS |
| Various Showcase Events | Aria debut showcase and promotional activities |
Note: Specific Aria-only tours have not been documented. Members participate in full-group tripleS concerts and events.
Brand Endorsements and Ambassadorships
This information is not publicly available. Specific brand endorsements or ambassadorships for Aria as a unit have not been widely documented.
Social Media Presence
| Platform | Handle / Link |
|---|---|
| Instagram (tripleS) | @triplescosmos |
| X (Twitter) | @triplescosmos |
| YouTube | tripleS official channel |
| Weverse | tripleS official channel |
| TikTok | @triplescosmos |
| Official Website | tripleS official website |
Note: Aria does not have separate social media accounts. All official content is shared through tripleS’s main channels.
Net Worth and Revenue Sources
This information is not publicly available. As members of tripleS and its various subunits, the members of Aria earn income from multiple sources:
Primary Income Sources
- Album Sales – Revenue from physical and digital album sales
- Music Streaming – Income from platforms like Spotify, Apple Music, Melon, etc.
- Concerts and Tours – Revenue from live performances
- Merchandise – Official merchandise sales
- Endorsements – Brand partnerships (limited public information)
- Variety Shows – Appearances on television programs
Estimated Net Worth
Exact net worth figures for individual members or the unit as a whole are not publicly available. As members of a successful K-pop group with international recognition, it is reasonable to assume that the members have accumulated wealth, but specific numbers have not been disclosed.
20 Interesting Facts About tripleS NEW BALLAD DIMENSION (Aria)
- Aria is tripleS’s first-ever ballad subunit.
- The unit was formed through the “Grand Gravity: Ballad Dimension” fan voting system.
- Seo DaHyun was pre-selected by MODHAUS staff.
- The other four members were selected as Combination D through fan voting.
- The name “Aria” was chosen by fans from nine suggestions.
- Their debut single “Door” had lyrics written by Heize.
- Aria is the seventh sub-unit of tripleS.
- The unit has five members: Seo DaHyun, Nien, Kim ChaeYeon, Lee JiWoo, and Kaede.
- Kaede is the first Japanese and first foreign member of tripleS.
- Lee JiWoo and Kim ChaeYeon have been in multiple subunits together.
- Nien is of Taiwanese-Vietnamese descent.
- Seo DaHyun is the leader of Aria.
- Kaede is the maknae (youngest) of Aria.
- The unit’s formation was announced in November 2023.
- Aria made their debut in January 2024.
- The members have also been active in other subunits including LOVElution, EVOLution, and +(KR)ystal Eyes.
- Nien participated in Girls Planet 999 before joining tripleS.
- Kim ChaeYeon was a member of Busters before tripleS.
- Kaede was a child model in Japan before becoming an idol.
- The unit’s concept focuses on emotional storytelling and vocal excellence.
Frequently Asked Questions (FAQ)
1. What is tripleS NEW BALLAD DIMENSION?
tripleS NEW BALLAD DIMENSION, officially known as Aria, is the first ballad-focused subunit of the K-pop girl group tripleS.
2. How many members does Aria have?
3. Who are the members of Aria?
The members are Seo DaHyun, Nien, Kim ChaeYeon, Lee JiWoo, and Kaede.
4. When did Aria debut?
Aria made their debut in January 2024.
5. What is Aria’s debut song?
Aria’s debut single is “Door,” with lyrics written by Heize.
6. Who is the leader of Aria?
Seo DaHyun is the leader of Aria.
7. Who is the youngest member of Aria?
Kaede (born December 20, 2005) is the youngest member (maknae).
8. Who is the oldest member of Aria?
Seo DaHyun (born January 8, 2003) and Nien (born June 2, 2003) are the oldest members.
9. What agency manages Aria?
10. What is tripleS’s fandom name?
tripleS’s fandom name is WAV.
11. How was Aria formed?
Aria was formed through the “Grand Gravity: Ballad Dimension” fan voting system in November 2023.
12. What does “Aria” mean?
An aria is a self-contained piece for one voice in an opera, typically showcasing the singer’s virtuosity.
13. Is Kaede Japanese?
Yes, Kaede is Japanese. She was born in Toyama, Japan.
14. Is Nien Korean?
No, Nien is of Taiwanese-Vietnamese descent. She was born in Taipei, Taiwan.
15. What other subunits are the members part of?
Members are part of various subunits including LOVElution, EVOLution, +(KR)ystal Eyes, ACID EYES, Infinity, Neptune, Hatchi, and Zenith.
16. Did any members appear on survival shows?
Yes. Nien participated in Girls Planet 999, and Lee JiWoo participated in My Teenage Girl (MTG).
17. What is Seo DaHyun’s nickname?
Seo DaHyun’s nickname is “Soda”.
18. What is Kaede’s Korean name?
Kaede’s Korean name is Kim AhReum (김아름).
19. Did Aria release any albums?
Aria released the debut single “Door” in January 2024. Members also participate in full-group tripleS albums.
20. Are Aria members still active in 2026?
Yes, all members remain active with tripleS and participated in the ASSEMBLE26 ‘LOVE & POP’ project in 2026.
Conclusion
tripleS NEW BALLAD DIMENSION, known as Aria, represents a beautiful and important chapter in the story of one of K-pop’s most innovative groups. As the first ballad-focused subunit of tripleS, Aria has demonstrated that the group’s talents extend far beyond dance-pop, showcasing the exceptional vocal abilities of its five members.
The formation of Aria through the “Grand Gravity: Ballad Dimension” fan voting system is a testament to the unique relationship between tripleS and their fans, WAV. The democratic process that brought these five members together-Seo DaHyun, Nien, Kim ChaeYeon, Lee JiWoo, and Kaede-reflects the innovative spirit that has defined tripleS since their debut.
Each member brings something special to the unit. Seo DaHyun provides leadership and powerful main vocals. Nien adds a unique multicultural perspective and warm vocal color. Kim ChaeYeon brings experience and versatility from her time with Busters. Lee JiWoo contributes her exceptional main vocal abilities and experience in multiple subunits. Kaede adds a fresh perspective as the first Japanese and first foreign member of tripleS.
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