Woo (우), born Woo Won-jae (우원재) is a South Korean rapper who debuted under AOMG on November 2, 2017, with the single titled "Anxiety".
In 2017, Woo participated in Show Me the Money 6, where he finished in third place. He gained a lot of popularity throughout the show.
Woo made his debut through releasing a single "We Are", featuring GRAY and Loco on September 4, 2017. The single was meant for Woo's final 2 stage in the finals of Show Me The Money 6, but he was eliminated in the top 3 round. The song was a very huge success as it made a successful all-kill in numerous Korean charts.