Cignature [시그니처]
- Debut (Y-M-D): 20-02-04
- Label: C9/J9 Entertainment
- Music Videos:
- Korean MVs: Nun Nu Nan Na, Assa, Arisong, Boyfriend, Sirius (Live Clip)
- Albums:
- Korean: Nun Nu Nan Na: lead single a [Digital Single], ASSA: lead single b [Digital Single], Listen and Speak [EP], Dear Diary Moment [EP]
- Fan Name: Signfan (싸인팬)
- Logo:
Members:
- Stage Name (Hangul): Chaesol (채솔)
- Position: Vocal, Visual
- Real Name: Moon Chaesol (문채솔)
- Birthday (Y-M-D): 98-07-14
- Nationality: Korean
- Height: 170cm
- Blood Type: A
- Formerly in: Good Day
- Stage Name (Hangul): Jeewon (지원)
- Position: Vocal, Center, Face
- Real Name: Kim Jiwon (김지원)
- Birthday (Y-M-D): 99-04-01
- Nationality: Korean
- Height: 166cm
- Blood Type: O
- Formerly in: Good Day as Jiwon
- Stage Name (Hangul): Seline (셀린)
- Position: Rap, Vocal
- Real Name: Jung Yeonjung (정연정)
- Birthday (Y-M-D): 00-06-02
- Nationality: Korean
- Height: 169cm
- Blood Type: N/A
- Stage Name (Hangul): Chloe (클로이)
- Position: Vocal
- Real Name: Jenny Yun/Yun Jiwon (윤지원)
- Birthday (Y-M-D): 01-01-06
- Nationality: Korean-American
- Height: N/A
- Blood Type: N/A
- Stage Name (Hangul): Belle (벨)
- Position: Vocal
- Real Name: Jin Hyeonju (진현주)
- Birthday (Y-M-D): 01-11-03
- Nationality: Korean (half Filipino)
- Height: 161cm
- Blood Type: A
- Formerly in: Good Day as Lucky
- Stage Name (Hangul): Semi (세미)
- Position: Vocal
- Real Name: Gu Semi (구세미)
- Birthday (Y-M-D): 02-04-10
- Nationality: Korean
- Height: 166cm
- Blood Type: N/A
- Stage Name (Hangul): Dohee (도희)
- Position: Rap, Dance, Maknae
- Real Name: Kwon Dohee (권도희)
- Birthday (Y-M-D): 02-08-01
- Nationality: Korean
- Height: N/A
- Blood Type: N/A
Former Members:
- From: Feb 2020 – April 2021
- Stage Name (Hangul): Sunn (선)
- Position: Rap, Dance, Vocal
- Real Name: Hwang Jiwon (황지원)
- Birthday (Y-M-D): 00-02-07
- Nationality: Korean
- Height: 167cm
- Blood Type: A
- Formerly in: Good Day as Viva
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