[6] After leaving DSP Media, she joined Source Music as trainee in 2013, where she trained for 1 year and 6 months before debuting as a member of GFriend.

[6] On January 15, 2015, Kim debuted as a member and sub-vocal of South Korean girl group GFriend under the stage name Sowon with the released of EP Season of Glass.

[8] On October 17, Kim made her debut as runway model for D-Antidote at S/S Hera Seoul Fashion Week 2019.

[12] On September 30, she made her acting debut in the television film My Chilling Roommate alongside iKon's Jung Chan-woo.

[16] On August 8, 2024, Oui Entertainment announced that Kim would be leaving the company after deciding not to renew her exclusive contract.