
H1-KEY (High-key) [하이키]
- Debut (Y-M-D): 22-01-05
- Label: Gradline Group (GLG)
- Music Videos:
- Korean MVs: Athletic Girl, RUN, Rose Blossom (건물 사이에 피어난 장미)
- Albums:
- Korean:
- Single Album: Athletic Girl (2022)
- Maxi Single Album: RUN (2022)
- Mini Album: Rose Blossom (2023)
- Korean:
- Fan Name: M1-KEY (마이키이)
- Logo:

Members:

- Stage Name: Seoi (서이)
- Position: Leader, Main Vocal
- Real Name: Lee Yejin (이예진)
- Birthday (Y-M-D): 00-02-12
- Nationality: Korean
- Height: 169cm
- Blood Type: N/A

- Stage Name: Riina (리이나)
- Position: Sub Vocal
- Real Name: Lee Seunghyeon (이승현)
- Birthday (Y-M-D): 01-02-21
- Nationality: Korean
- Height: 172cm
- Blood Type: B

- Stage Name: Hwiseo (휘서)
- Position:
- Real Name: Jo Hwihyeon (조휘현)
- Birthday (Y-M-D): 02-07-31
- Nationality: Korean
- Height:167.7cm
- Blood Type: N/A

- Stage Name: Yel (옐)
- Position: Vocal, Rap, Maknae
- Real Name: Han Shinyoung (한신영)
- Birthday (Y-M-D): 04-12-25
- Nationality: Korean
- Height: 172cm
- Blood Type: N/A
Former Members:

- From: Jan 2022 – May 2022
- Stage Name: Sitala*** (시탈라)
- Position: Rap, Vocal
- Real Name: Sitala Wongkrachang (ศีตลา วงศ์กระจ่าง)
- Birthday (Y-M-D): 96-04-23
- Nationality: Thai
- Height: 173cm
- Blood Type: N/A
Social Media + :
***Sitala will not be getting any further updates other than her former member status