FIONA (피오나) was a four-member girl group under Supreme Entertainment. They made their debut on November 27, 2017 with "I Don't Know".
They were not active for very long. In January 2016, they held their last public performance at the Hwacheon Mountain Trout Festival.
|Ahn Miji (안미지)||Vocalist||2015-2016|
|Kwon Gyuri (권규리)||Leader, Vocalist||2015-2016|
|Jeong Eunji (정은지)||Vocalist||2015-2016|
|Hong Seoha (홍세아)||Maknae, Vocalist||2015-2016|
- "I Don't Know" (2015)