The group is composed of ten members: Seola, Bona, Exy, Soobin, Luda, Dawon, Eunseo, Yeoreum, Dayoung, and Yeonjung.

[10] In August 2016, Seola, Exy, Soobin, Eunseo, Cheng Xiao, Yeoreum, and Dayoung teamed up with label mate Monsta X to form the unit Y-Teen.

It was a project unit group that promoted as CF models for KT’s phone fare service and would release EPs, music videos, and various entertainment content.

[21][22] On June 1, WJSN and Weki Meki formed a project group called WJMK and released a digital single "Strong".

[33] WJSN held their second solo concert, "Would You Stay - Secret Box," from March 2–3 at the Blue Square Imarket Hall.

[citation needed] WJSN released their eighth mini album Neverland, including the title track "Butterfly," on June 9.

[46] On February 21, 2022, it was confirmed that WJSN will be participating in the second season of Mnet competition show Queendom, which ran from March to June 2022.

[47] Dawon did not participate in the show, while Bona joined in the third round due to scheduling conflicts with her drama Twenty-Five Twenty-One.

[51] On November 18, Starship Entertainment announced a fan concert '2023 WJSN Fan-Con Codename: Ujung' that took place on January 7 and 8, 2023.

[52] On March 3, 2023, Starship Entertainment announced that Xuanyi, Cheng Xiao, and Meiqi had departed from WJSN following the expiration of their contracts.

[53] On March 13, 2023, Soobin clarified that Luda and Dawon have not left WJSN, followed by an official statement by Starship Entertainment backing up the information.

[54] In a 2024 interview with South Korean news outlet Newsen, Yeonjung revealed that there "aren't any concrete plans" for a group comeback.