MBK娱乐旗下的7人女子团体,名称DIA源自英文(Diamond)的缩写,取其「随着时间??推移、接收大家的爱而成为最高贵、闪闪发亮的宝石」之意义
Current DIA Members:
1. Seunghee (Real Name: Cho Seung Hee) (LEADER of the group) (Date of Birth June 3, 1991, Age: 24) (Former member of F~IVE DOLLS) Position in the Group: Leader, Vocalist.

2. Eunice (Real Name: Seo Soo Yeon) (Date of Birth: 1991, Age: 24 (Eunice is reported to be skilled in dancing, singing, and is fluent in Japanese) Position in the Group: Vocalist and Dance

3. Chaeyeon (Real Name: Jung Chae Yeon) (Date of Birth: December 1, 1997, Age: 18 (Chae Yeon previously appeared in Elsie’s solo music video "I'm Good" and got a lot of response because of her visuals since the appearance) Position in the Group: Vocalist

4. Jenny (Real Name: Lee So Yul) (Date of Birth: September 14, 1996, Age: 19 (Jenny is known for her innocent look and singing, she also has strong acting abilities, she’s also former Project A member) Position in the Group: Vocalist

5. Eunjin (Real Name: Ahn Eun Jin) (Date of Birth: 1997, Age: 18 (Eunjin has a bright personality that attracts people and also with her strength in dance skills) Position in the Group: Vocalist and Dance

6. Yebin (Real Name: Baek Ye Bin) (Date of Birth: 1997, Age: 18 (Yebin has a charming voice and has great singing skills and is said to have powerful vocals) Position in the Group: Vocalist

7. Cathy (Real Name: Gi Hee Hyun) (Bate of Birth: June 16, 1995, Age: 20) (Cathy is a former Woollim trainee and has great charismatic rapping abilities and dancing skills) Position in the Group: Rapper and Dance