members
| full name | native name | stage name | number | nationality | generation.SSS debut |
|---|---|---|---|---|---|
| yoon seoyeon | 윤서연 | SeoYeon | S1 | korean | v0.1 |
| jeong hyerin | 정혜린 | HyeRin | S2 | korean | v0.1 |
| lee jiwoo | 이지우 | JiWoo | S3 | korean | v0.1 |
| kim chaeyeon | 김채연 | ChaeYeon | S4 | korean | v0.1 |
| kim yooyeon | 김유연 | YooYeon | S5 | korean | v0.1 |
| kim soomin | 김수민 | SooMin | S6 | korean | v0.1 |
| kim nakyoung | 김나경 | NaKyoung | S7 | korean | v0.1 |
| gong yubin | 공유빈 | YuBin | S8 | korean | v0.1 |
| yamada kaede | 山田 楓 (야마다 카에데) | Kaede | S9 | japanese | v0.2 |
| seo dahyun | 서다현 | DaHyun | S10 | korean | v0.2 |
| kamimoto kotone | 嘉味元 琴音 (카미모토 코토네) | Kotone | S11 | japanese | v0.3 |
| kwak yeonji | 곽연지 | YeonJi | S12 | korean | v0.3 |
| hsu nientzu | 许念慈 (쉬니엔츠) | Nien | S13 | taiwanese-vietnamese | v0.3 |
| park sohyun | 박소현 | SoHyun | S14 | korean | v0.4 |
| zhou xinyu | 周心语 (저우신위) | Xinyu | S15 | chinese | v0.4 |
| mayu | tbc | Mayu | S16 | japanese | v0.4 |