ONEUS · GROUP MEMBER · SOLO ARTIST
Xion
Years active: 2019–present
The maknae who quietly became the plot.
Quick profile
Birth name: Son Dong-ju
Born: January 10, 2000
Role: Vocalist, visual, and maknae
Group: ONEUS
Fandom: TOMOON
Before ONEUS
Xion joined the trainee system later than several of his members and debuted with less formal training behind him. He is also the younger twin brother of ONEWE’s Dongmyeong, which means one family somehow produced two idols and the rest of us should stop bragging about group projects.
Why the group needs Xion
His growth is one of the easiest ONEUS stories to watch in real time. Early performances used him carefully. Later eras gave him more lines, more visual responsibility, and more space to build a distinct tone. By X, Seoho was enlisted and Xion was not hiding at the edge of the formation. He was one of the reasons the four-member frame worked.
Solo work and credits
His 2025 solo Altar leaned into the dramatic, elegant image that suits him. He also earned writing credits in the 5x era. The improvement is not only technical. He now performs like someone who knows exactly why the camera came.
The person fans actually follow
Xion is affectionate, observant, and much more socially powerful inside ONEUS than the maknae label suggests. Members have described going to him with worries. He also communicates frequently with fans. The youngest one became the emotional help desk. Nobody planned that, but everyone appears to use the service.
Start digging
Read the full ONEUS group profile, then open the X review. Related reviews and sourced updates will continue to collect through the ONEUS tag instead of being copied into separate profiles.
Official links
Instagram @_xioneus
ONEUS official site
ONEUS Japan official profile
Profile sources: ONEUS official sites, official member accounts, RBW and B.Wave notices, broadcast records, album credits, and archived interviews. Facts are updated when the public record changes.