Moonbyul

Moon Byul-yi (Korean: 문별이, born December 22, 1992), known professionally by her stage name Moonbyul (문별; stylized as Moon Byul), is a South Korean rapper and songwriter signed to RBW. She is a member of the South Korean girl group Mamamoo and its sub-unit Mamamoo+.

She made her debut as a solo artist in May 2018, releasing the digital single "Selfish". According to the Korea Music Copyright Association, Moonbyul has songwriting credits on over 100 songs, making her one of the most credited female artists in the Korean music industry. She is also known for winning first place on JTBC's survival show The Second World.