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I (아이) is a South Korean singer formerly under WM Entertainment.
- Stage Name: I (아이)
- Birth Name: Cha Yoon Ji (차윤지)
- Birthdate: December 2, 1996
- Birthplace: Gwangju
- Blood Type: O
- Height: 157cm
- Weight: 40kg
- Family: Older brother Baro of B1A4
- Hobbies: Self nail art, painting, playing guitar
- Specialty: Choreography, fast memorization, Japanese
- Charm Point: Long eyelashes
- [2017.01.11] I DREAM
-  The Unit (Contestant - Left show after ep 4)