- Stage Name: Gaeul (가을)
- Real Name: Park Gaeul (박가을)
- Birthdate: May 8, 1999
- Birthplace: Seoul, South Korea
- Blood Type: B
- Height: 164cm
- Weight: 48kg
- Family: Parents and brother
- Hobbies: Painting, shopping, nail art, making dolls out of socks
- Specialties: Ballet, dance
-  Produce 101
- She was trainee for six months prior to her appearance on Produce 101.
- Her favorite colors are black, white, and purple.
- Her favorite fashion style is street fashion.
- Her favorite food is ddeokbeokki.
- Her least favorite foods are beans and seafood.
- Her role models are Hyun A and SHINee's Taemin.