- Full name: Kim Yongsun
- Date of Birth: February 21, 1991
- Nationality: Korean
- Blood type: B
- Group: Mamamoo
- Agency: RBW Entertainment
- Debut: June 2014
- Position in the group: Leader, main Vocalist
- Family members: Mom, dad, older sister, Solar
- Nickname: ‘solbugi(solar+Squirtle), ‘Youngddoni’, and ‘Daejangnim'(boss)
- Solar is the oldest member of the group
- Solar owns a YouTube channel, ‘Solarsido‘
