1997.09.04
Vocal, Visual

・She's from Gangdong-gu, Seoul
・Her MBTI is INFP
・She was nicknamed "Jelly-Jieun" by members becuase she eats so much of it
・She appeared on the Mnet survival show Produce48 with Goeun and ranked 80
・She also auditioned for Mixnine but wasn't accepted
・She's been nicknamed "Bambi" because of her visuals
・She is good at Japanese
・She owns a dog though we don't know his nameDebut Trailer : Fashion

1999.09.03
Vocal & Dance

・She's from Nam-ju, Gwangju
・She was on Produce48 along with Jieun where her ending rank was 29
・She went to Hanlim Multi Arts and was in the same class as LOONA's KimLip and Chuu
・Both her visuals and voice have been said to resemble SNSD's Taeyeon
・She has an older brother
・Both her and Eunseong enjoy cooking and will sometimes do so for the group
・Her favorite show to watch is JTBC's, "Begin Again"
・ Composed and written several of Purple Kiss' songsDebut Trailer : New Iconic

2000.02.11
Dance & Vocal

・She's from Busan
・She participated on the show Mixnine and her ending rank was 78
・She was previously a Hanlim Multi Arts student
・She likes to draw and will sometimes post them on their Instagram
・She has a fraternal (non-identical) twin sister
・Known as the all-rounder in the group
・Her all-time favorite movie is "Little Forest"
・Her favorite singers are Kehlani and HONNE
・She has several merch items of a cartoon shark character by the name of BOSS
・ Jieun, Ireh, and she all have the same MBTI, INFP
・ She and her twin both have a habit of refering to themselves in the 3rd personDebut Trailer : Mmuuaahh

2002.04.30
Dance & Vocal

・ Seoyoung describes own personality as being shy around strangers and high tension
・ She's the most confident in her dance skills
・ Before joining RBW she and Chaein were both under YG and Yuehua at some point
・ She began to sing and dance around her 2nd year in Middle School
・ For her auditions, she sang the song Main Girl by Charlotte Cardin
・She also enjoys drawing and is quite good at it
・Jieun, Ireh, and Dosie all have the same MBTI, INFP
・Her favorite ice cream flavor is mint chocolateDebut Trailer : Can't Stop Dreamin'

2002.11.06
Rap & Dance

・Her hometown is Tokyo, Japan
・RBW's first Japanese idol
・She's a fan of the boy group Pentagon
・Enjoys going shopping by herself
・She's been dancing since she was eight years old
・ She and Eunseong share a room in their dorm
・She writes all her own rap lyrics in a notebook that she showed in a video at one point
・Whenever she's upset or frustrated she ends up not talking
・Her favorite character is called Anpanman
・She has a 9 year old cat called Gingjjang
・Her biggest habit is putting a thumbs up for everythingDebut Trailer : WH0 CARES?

2002.12.05
Vocal & Dance

・ Composed several songs for Purple Kiss and often posts song snippets on Twitter
・ She believes her most charming point is her loyalty to friends
・ Most confident in her vocal ability
・ Audition song was Ariana Grande's Dangerous Woman
・On her time with the show KPOP STAR she became friends with TREASURE's Yedam, ITZY's Chaeryeong and IZ*ONE's Chaeyeon
・Was under YG as part of "Future 2NE1"
・She also has two dogs,Willy and Bella
・She's able to speak English pretty well but isn't entirely fluentDebut Trailer : Like a Star

2003.07.11
Vocal & Maknae

・She can speak English because she lived in the Philippines for a year
・ Composed/wrote Ponzona along with Goeun originally for a trainee evaluation song
・She's the youngest member
・She's been a trainee at RBW since Oct. 2017 making her the second longest to train at RBW in the group next to Dosie
・Sujin has done the guides for both Mamamoo's Wind Flower and Chungha's Snapping
・ In addition to her guides she's also credited with the backing vocals of Chungha's SnappingDebut Trailer : Fill & Feel