Yoo Seungeon

Yoo Seungeon was born on January 2, 2004, in Bugok-dong, Geumjeong-gu, Busan, South Korea. He has an older brother born in 2000 and a younger brother born in 2009. Source: KProfiles

Seungeon competed on Mnet's Boys Planet in 2023, ultimately finishing 16th overall, narrowly missing a place in the debut lineup of ZEROBASEONE. Source: Kpop Fandom Wiki

Instead of giving up, Seungeon debuted a few months later with the project group EVNNE (originally introduced as BLIT) on September 19, 2023, releasing the debut mini album Target: Me. Source: Kpop Fandom Wiki

Before joining YH Entertainment in 2022, Seungeon briefly trained under SM Entertainment in 2019. Source: KProfiles

His well-known nicknames include Eon-ie, Ons, and Onion. Source: KProfiles

Before pursuing music full-time, Seungeon practiced archery and also played on a soccer team for about five years during his childhood. Source: NamuWiki

His biggest musical role models are Highlight's Yang Yoseop, BTOB's Yook Sungjae, and EXO's D.O. and Baekhyun, all singers he greatly admires for their vocal abilities. Source: KProfiles

Seungeon is a huge anime fan, with Haikyuu!! ranking as his favorite series. Fans have also compared his appearance to a bunny, deer, and ermine, with the ermine comparison becoming especially fitting because it served as his mascot during his EVNNE promotions. Source: KProfiles

During their trainee days under YH Entertainment, Seungeon and fellow AND2BLE member Kim Gyuvin reportedly snuck out of the dorm at night to visit Lotte World together. Source: KProfiles

On December 8, 2025, it was officially announced that Seungeon would conclude his activities with EVNNE and return to YH Entertainment, while EVNNE continued promotions as a five-member group. Source: KProfiles

Seungeon was officially revealed as AND2BLE's fifth and final member on April 3, 2026, joining former ZEROBASEONE members Zhang Hao, Ricky, Kim Gyuvin, and Han Yujin. Source: Starvia

During his time in EVNNE, Seungeon served as the group's main vocalist, earning praise for his refreshing vocal tone, wide range, and especially his powerful high notes. He continues to showcase those strengths as one of AND2BLE's main vocalists alongside Zhang Hao. Source: NamuWiki

Seungeon has described himself as a perfectionist who finds multitasking difficult, preferring to focus intensely on one task at a time until it's complete. Source: NamuWiki

Fans know Seungeon as someone who openly expresses his emotions. He has become emotional on camera multiple times, including during the Boys Planet finale and again at EVNNE's debut showcase, moments that highlighted his sincerity and passion for performing. Source: NamuWiki

His journey—from narrowly missing the ZEROBASEONE lineup to successfully debuting with EVNNE and later joining AND2BLE—has become one of the most inspiring comeback stories among recent Boys Planet contestants. Source: KProfiles, Kpop Fandom Wiki

Seungeon's combination of strong technique, emotional delivery, and dependable live vocals has earned him recognition as one of the standout vocalists of his generation. Source: Fan discussions, NamuWiki

With experience leading the vocal line in EVNNE and now sharing that responsibility in AND2BLE, Seungeon continues to build a reputation as a versatile singer capable of handling everything from soaring ballads to energetic pop performances. Source: NamuWiki