The Ark (디아크) was a girl group formed by Music K Entertainment. They made their debut on April 10, 2015 with the single "Somebody 4 Life".
They were known to be a girl group with powerful dance moves since they were noted to be a hip-hop group. They were confirmed to have disbanded in 2016.
- Yujin (유진) - main vocalist
- Halla (한라) - visual, lead dancer, vocalist
- Jane (재인) - lead rapper, maknae
- Minju (민주) - leader, lead vocalist, main dancer
- Yuna (유나) - main rapper
- "Somebody 4 Life" (2015)