Group Members

Kim Seonyou (CLASS:y) Profile, Bio, & Facts

Kim Seonyou (CLASS:y)

Kim Seonyou (김선유) is a South Korean singer and a member of the girl group CLASS:y under M25.

Kim Seonyou (CLASS:y) Profile

Stage NameSeonyou (선유)
Birth NameKim Kim Seonyou (김선유)
BirthdayMarch 20, 2008
Active Years2022–present
Age16 (in 2024)
Zodiac SignPisces
Height160 cm (5’3″)
Weight43 kg (95 lbs)
Blood TypeB

Kim Seonyou (CLASS:y) Facts:

Early Life

– Kim Seonyou was born in Gangneung, Gangwon-do, South Korea.
– She went to Hansol Elementary School.
– She transferred from Hasla Middle School and graduated from Cheongdam Middle School.

Personal Life

Jimin said Seonyou is mischievous and feels like the younger sister. (ELLEgirl)
– Her family consists of her parents, an older brother born in 2003 and older sister born in 2004.
– She is enrolled at Hanlim Entertainment Arts High School (Entertainment Department)
– She is friends with Kep1er’s Youngeun.
– She used to be a figure skater. (엔터로 │ Entero)
– She doesn’t like to eat vegetables.
– She tends to get distracted when studying and often suggests members to go out for playing according to Hyeju.
– She is known for her laughter and often tags herself with the hashtag #Laughing_angel.
– She is nicknamed Baby Duck and Baby Hangjji.
– Her disadvantages are poor eyesight and a small memory. (Weekly Idol Self Profile)
– Her motto is ‘If you don’t do anything, nothing will happen.’
– She has a good sense of balance because she was a figure skater.
– She likes members Hyungseo, Chaewon, and Hyeju because of their humor and charm. 
– Her favorite ice cream is Hershey’s ice cream. (클리키 시선)
– She is skilled in dodgeball and dance.
– She wants to be a partner with Riwon among all the members.  (팬바타 FANVATAR)


– She is the main rapper, lead dancer, vocalist, and maknae in CLASS:y.
– She is an all rounder in the group.
– She participated in the survival show CAPTEEN, but was unfortunately eliminated during the initial performance evaluation.
– She was acknowledged as one of the standout performers among the 1st-grade participants in My Teenage Girl.
– She ranked 2nd in the final episode of My Teenage Girl and was included in the final lineup of CLASS:y.
– She managed to clear three survival show auditions.

Instagram: @sun_u08
Youtube: [Sunflu] Sun U

Streaming Platform Links
Genie | Melon | Bugs

Kim Seonyou Photos

Note: How did you get to know Kim Seonyou? Mention your story in the comments section and also share more facts with us if you know!

‘ZEALOUS’ Fancam:


Lilian Chen

Yo! I'm Lilian, an Ahgase and a curious wordsmith on a never-ending quest for knowledge. Don't hesitate to spot any slip-ups in my work and feel free to reach out with additional facts & insights! ^^