Sullyoon

Sullyoon (설윤) – Profile

NMIXX Sullyoon Photo.

Who is Sullyoon NMIXX ?

Sullyoon (설윤), born Seol Yoon-a on January 26, 2004, in Daejeon, South Korea, is a South Korean singer, dancer, and visual artist. She is best known as a member of the JYP Entertainment girl group NMIXX, where she serves as the lead vocalist and visual. Known for her angelic visuals and powerful voice, Sullyoon has quickly captured the attention of K-pop fans around the world.

Sullyoon (설윤) – NMIXX Biodata

Complete biodata table of Sullyoon from NMIXX including her real name, birthdate, height, MBTI, education, hobbies, and more.

Sullyoon (설윤) – Complete Biography

Read the complete biography of Sullyoon, a member of NMIXX under JYP Entertainment. Discover her journey, debut, education, talents, and rise as a K-pop star.

Sullyoon, born Seol Yoon-a (설윤아) on January 26, 2004, in Daejeon, South Korea, is a South Korean singer, dancer, and member of the K-pop girl group NMIXX under JYP Entertainment. Known for her angelic visuals, versatile vocal tone, and graceful performance skills, Sullyoon quickly emerged as a fan favorite in the fourth generation of K-pop idols.

Early Life and Education

Sullyoon grew up in Daejeon, a major city in South Korea known for its strong academic culture. She was an intelligent and artistic child who was active in various school activities and even served as class president. She pursued her secondary education at Hanlim Multi Arts High School, one of the most prestigious arts schools in Korea, majoring in Broadcasting & Entertainment. She graduated in February 2023.

Becoming a Trainee

Sullyoon passed multiple high-profile auditions with entertainment agencies such as SM, YG, Fantagio, and The Black Label before choosing to sign with JYP Entertainment in 2020. Her entrance into JYP’s training system was kept relatively low-profile until her official introduction as a member of the upcoming girl group NMIXX.

Debut with NMIXX

On September 2, 2021, Sullyoon was introduced as the fourth member of NMIXX through a special performance cover of Sunmi’s “Full Moon.” Her elegance and stage charisma stunned fans and quickly earned her a following even before the group’s official debut.

NMIXX officially debuted on February 22, 2022, with the single album AD MARE and the title track “O.O.” Sullyoon was noted for her sharp visuals and vocal delivery, helping the group make a strong first impression in the competitive K-pop scene.

Career Highlights

As the lead vocalist and visual of NMIXX, Sullyoon has participated in several comebacks, including ENTWURF, expérgo, and Fe3O4: BREAK. Her individual fancams have gone viral due to her refined performance style and visual appeal, often drawing comparisons to senior idols like Tzuyu of TWICE.

In April 2023, Sullyoon became one of the official MCs of Show! Music Core, a major music broadcast show on MBC, alongside Jungwoo (NCT) and Lee Know (Stray Kids). She remained an MC until February 2025, further enhancing her public presence and showcasing her communication skills and charm.

Personality and Interests

Sullyoon is known to be introverted yet thoughtful, with her MBTI being ISFP. Fans describe her as elegant, kind, and articulate. Her hobbies include listening to music, watching anime, reading webtoons, and studying languages. She is learning Spanish and can communicate in English to some extent, which makes her accessible to international fans.

Legacy and Popularity

Despite being relatively new to the industry, Sullyoon has already established herself as a rising star. Her ability to captivate with both looks and talent has made her one of the standout members of NMIXX. Her fancams consistently receive high view counts, and she continues to gain recognition in fashion, media, and entertainment circles.

With her dedication, elegance, and growing popularity, Sullyoon is poised to become one of the defining icons of the 4th generation of K-pop. Fans eagerly await her future endeavors both as part of NMIXX and in individual activities.

Why Fans Love Sullyoon

• Elegant visuals often compared to Tzuyu of TWICE
• Strong vocal technique and stage charisma
• Fluent in Korean and speaks some English and Spanish
• Known for being polite, reserved, and sincere
• MC of MBC’s Show! Music Core (2023–2025)

NMIXX and Sullyoon’s Discography

Sullyoon has participated in multiple successful NMIXX releases including AD MARE, ENTWURF, expérgo, and Fe3O4: BREAK. Their 2025 comeback, Fe3O4: FORWARD, features the chart-topping title track “KNOW ABOUT ME.”

Fun & Interesting Facts About Sullyoon (설윤) of NMIXX

Discover the most interesting and fun facts about Sullyoon of NMIXX, from her pre-debut days to her unique talents, personality, and popularity.

• Her real name is Seol Yoon-a (설윤아), and she was born on January 26, 2004 in Daejeon, South Korea.
• Sullyoon was a trainee under JYP Entertainment for approximately 1 year before debuting.
• Before joining JYP, she passed auditions for SM, YG, FNC, Fantagio, and The Black Label.
• She graduated from Hanlim Multi Arts High School in the Broadcasting & Entertainment Department in 2023.
• She was officially revealed as the fourth member of NMIXX on September 2, 2021.
• Sullyoon’s debut performance cover was Sunmi’s “Full Moon”—her visuals and vocals gained immediate attention.
• She made her debut with NMIXX on February 22, 2022 with the album AD MARE.
• Her MBTI personality type is ISFP—often described as gentle, creative, and introverted.
• She speaks Korean fluently, and also studies English and Spanish.
• Her fans nicknamed her “Princess Sullyoon” and also jokingly call her “General Sullyoon” due to her poised demeanor.
• Sullyoon served as an MC on MBC’s Show! Music Core from 2023 to early 2025.
• She is admired for her elegant visual appearance and often compared to TWICE’s Tzuyu.
• Her fancams regularly go viral, thanks to her smooth performance style and facial expressions.
• Her hobbies include listening to music, reading webtoons, watching anime, and learning languages.
• Sullyoon once served as class president during her school years.
• She is left-handed!
• Among NMIXX members, she is known to be soft-spoken but has a surprisingly playful side.
• Despite her reserved personality, she has a strong presence on stage and during interviews.
• Sullyoon is considered one of the top visuals of 4th generation K-pop by both fans and media outlets.

Social Media & Appearances

As part of NMIXX, Sullyoon can be found on the group’s official social media channels. Her performances regularly trend on YouTube and TikTok, where fans admire her captivating visuals and professionalism.