Sion Profile: Age, Height, Career, Facts & More
Sion is the leader, lead vocalist, and oldest member of NCT WISH, the sixth unit of NCT.
Born in Mokpo and trained at SM Entertainment for roughly four years, he rose through the survival show NCT Universe: LASTART and has been the steady center of a group that went from a Japan-focused rookie act to a million-selling touring name.
This complete profile breaks down everything fans want to know about Sion: his age, height, career, personality, and the fun facts that keep circulating through the fandom.
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Quick Facts About Sion
- Real Name: Oh Si-on (오시온)
- Stage Name: Sion (시온 / シオン)
- Nicknames: Ocean, Iriosion, Wolf
- Birth Date: May 11, 2002
- Zodiac Sign: Taurus
- Chinese Zodiac Sign: Horse
- Birthplace: Mokpo, Jeollanam-do, South Korea
- Position: Leader, Lead Vocalist, Dancer
- Height: Approximately 179 cm (5’10.5″)
- Blood Type: O
- MBTI: INTJ-A
- Nationality: South Korean
- Agency: SM Entertainment (group activities also managed with Avex in Japan)
- Group: NCT, NCT WISH
- Representative Emoji: 🌷 (Tulip)
- Education: Mokpo Aehyang Middle School; high school equivalency exam (passed)
Early Life and Background
Sion was born on May 11, 2002, in Mokpo, Jeollanam-do, and has a younger sister born in 2004. He attended Mokpo Aehyang Middle School and later left high school, then passed the high school equivalency exam.
He played bass guitar in middle school, though he says he is especially fond of drums, and he has said that if he hadn’t become a singer, he would have considered modeling.
He trained at SM Entertainment for about four years before his public introduction. On June 28, 2023, he was introduced as the newest member of SM Rookies and as a future NCT member, alongside Yushi. During his trainee days, he roomed with RIIZE’s Sohee.
He lists EXO’s Kai as his role model and NCT as his favorite artist, naming “We Go Up” and “Touch” as his favorite NCT songs, and he has said he wants to learn as many languages as possible so he can talk to fans around the world. Asked to describe himself in one word, he chose “Water.”
Career Highlights
NCT Universe: LASTART Sion was one of the main contestants on NCT Universe: LASTART, the survival show that formed NCT’s newest unit, then known as NCT New Team. He was introduced as the team’s leader, and the show’s choreographer, Baek Jihoon, said he learned choreography very quickly and made it his own.
Fan-compiled records list him in third place in the final standings. The show ended on September 7, 2023, and the seven-member lineup became six after Jungmin returned to trainee status in October 2023 to focus on his health.
Debut as NCT WISH The group released the pre-debut single “Hands Up” on October 19, 2023, and held a pre-debut tour in Japan with 28 shows across 10 cities. On January 17, 2024, it was officially named NCT WISH, a name that combines “NCT” with the catchphrase “WISH for Our WISH.” The group debuted on February 21, 2024, with the single “WISH,” performed for the first time at SMTOWN LIVE 2024 in Tokyo.
That January, the Grammys’ website had already named NCT WISH among its “11 Rookie K-Pop Acts to Know in 2024.” In April 2024, the group announced its first fan meeting, School of Wish, with four shows at Myunghwa Live Hall in Seoul, and it released “Songbird” as its second single that summer.
A Million-Selling Run NCT WISH’s second EP, Poppop, was released on April 14, 2025, and sold more than 1.08 million copies, making the group a million-seller act. The September 2025 EP COLOR sold more than 1.3 million copies in its first week, according to Korean media.
In January 2026, the group released its first Japanese mini album, Wishlist, and went on its first solo concert tour, Into the Wish: Our Wish, with 30 shows across 18 regions and sold-out encore concerts at KSPO Dome in Seoul from April 17 to 19.
The Ode to Love Era On April 20, 2026, NCT WISH released its first Korean full-length album, Ode to Love, a 10-track project built on UK garage-inspired dance-pop and a storyline from the mythology of Eros and Anteros.
In an interview around the album’s release, fellow member Riku said that he and Sion had learned to trade eye contact on stage by the end of the tour, a small sign of the leader’s role in keeping the group in sync.
Korean outlets also reported on September 7 that a fourth mini album was planned for October 2026.
Personality and Public Image
Sion describes himself as prudent and reasonable, with a good sense of humor, and fans and members describe him as calm, caring, and quick to act.
On LASTART, he was already known as a gentle caretaker of the younger contestants, which suits his role as the group’s oldest member. His powerful dance skills are often cited as his most charming quality, and he is known for taking the lead without raising his voice.
Within NCT WISH, he lives in a single room in the group’s dorm arrangement, and his steady presence has been described as the anchor of a group where Riku, Yushi, Jaehee, Ryo, and Sakuya each bring a very different energy. As the leader, he is also the member most often asked to speak for the group at press events.
Fun Facts and Trivia
- Sion is the oldest member of NCT WISH and its leader.
- He was a trainee for about four years before debuting.
- His nicknames are Ocean, Iriosion, and Wolf.
- His representative emoji is a tulip.
- He roomed with RIIZE’s Sohee when both were trainees.
- His role model is EXO’s Kai.
- His hobbies include finding good songs, reading, watching anime and dramas, and bowling.
- He enjoys coffee and sweet scents.
Social Media and Where to Follow
Sion appears across NCT WISH’s official channels, including Instagram, X (formerly Twitter), TikTok, and YouTube, where the group posts stage clips, vlogs, and tour content.
Fans looking for his leadership moments can revisit the Ode to Love press conference and the Into the Wish: Our Wish tour footage.
With a fourth mini album reportedly on the way, Sion’s steady leadership is likely to stay central to the group’s next chapter.
Conclusion
From a Mokpo trainee who spent four years preparing to the leader of a million-selling NCT unit, Sion’s career reflects patience, steadiness, and quiet confidence. Whether fans are drawn in by his lead vocals, his dance skills, his calm leadership, or his role in the group’s touring era, Sion continues to prove why NCT WISH has grown so quickly. As the group’s reach continues to expand, all eyes remain on Sion to see how he leads it next.
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