Stray Kids has three main sub-units: 3RACHA, Danceracha, and Vocalracha. The 3RACHA sub-unit is the first and most well-known, consisting of Bang Chan, Changbin, and Han, who are responsible for producing and writing many of Stray Kids’ songs. This sub-unit was formed in 2016, even before Stray Kids officially debuted.
Danceracha is another sub-unit, which focuses on dance and includes Lee Know, Hyunjin, and Felix. They are known for their impressive dance skills and often help lead the group in choreography.
Vocalracha is the third sub-unit, focusing on vocals and consisting of Seungmin and I.N. These members are known for their strong singing abilities and often cover the melodic parts of Stray Kids’ songs.
These sub-units are named after the original 3RACHA, and while they highlight specific talents, the members are versatile and often participate in multiple roles within the group.
Additionally, there are some unofficial or fan-made sub-units, but the three main ones are 3RACHA, Danceracha, and Vocalracha.