Artist: Cosmic Girl (feat. San E)
Song: Don’t You Worry ’bout Me
Previous: What are you doing?
Cosmic Sound

Note: She was formerly Jooyi of RaNia.

Also, her name here is literally Cosmic Girl (koseumik kkeol).
The girl group Cosmic Girls is an English translation of ‘Wu Ju So Nyeo’ (WJSN). So, in Korean, they do not have the same name.