Changbin

Seo Changbin (서창빈) is one of the core architects behind Stray Kids. As the group's main rapper, sub-vocalist, and a founding member of 3RACHA alongside Bang Chan and Han, he helped shape the self-producing identity that turned the JYP Entertainment act into one of K-pop's defining arena groups. His writing is not a side note. It is central to the group's tone, from the raw early mixtape energy to the scale of global releases like ATE and 5-STAR. Born on August 11, 1999, in Yongin, South Korea, Changbin debuted with Stray Kids on March 26, 2018. Before official debut, he was already building a reputation inside JYP through 3RACHA's underground uploads and in-house production work. That authorship has only expanded. By late 2025 he held nearly 200 KOMCA credits, a rare number for an idol still in his mid-20s and a clear marker of how much of the group's catalogue runs through his pen. Outside group promotions, Changbin has kept a visible solo lane through features, campaign tracks, and cross-artist collaborations. He appeared on ITZY's track "VAY," contributed to Samsung campaign music, and continued to build his reputation as one of the most technically sharp rappers in idol music. In 2026, that reach extended into fashion when Autry named him its first global brand ambassador. The appeal is straightforward. Changbin combines brute-force delivery with real composition credits, and he has the catalogue to prove it.