Originally a seven-piece ensemble, members Tan, Tag, Dohwan, and Won left the group on August 9, 2023.

[2] About selecting the members for the first group signed under his R.A.I.N company, Rain said, "There were a lot of factors involved in the process of making Ciipher, but when I met these kids, I felt like I could bet it all on them.

[3] Prior to joining the group, many of the members had auditioned on popular television programs or trained at other major labels.

[2] In December 2014, Tan competed in Mnet's survival reality show No.Mercy under his birth name Choi Seok-won.

[4] Keita and Dohwan were former contestants on YG's Treasure Box, but they both did not make it into the show's final debut lineup.