CLASSy

CLASSy (클라씨, formerly CLASS:y) is a 7-member girl group formed through the MBC survival show My Teenage Girl. The group is managed by K-TIGERS Entertainment for Korean promotions and Universal Music Japan for Japan promotions. The aim of the group is to have potential to chart on the Billboard charts. The members are Hyungseo, Chaewon, Hyeju, Riwon, Jimin, Boeun, and Seonyou. They debuted on May 5, 2022, with their first mini album, Y: CLASS IS OVER. They made their Japanese debut on June 22, 2022. On November 14, 2025, it was announced that they had left M25 and joined K-TIGERS Entertainment. On June 10, 2026, it was announced that their name changed from CLASS:y to CLASSy.

CLASSy members height, age

Click on a member's name to scroll to their profile

Member	Height	Age
Hyeju	165 cm	22 years
Hyungseo	161 cm	25 years
Chaewon	161 cm	23 years
Riwon	156 cm	19 years
Jimin	173 cm	18 years
Boeun	160 cm	18 years
Seonyou	162 cm	18 years

Debut Date: May 5, 2022
Group Name Meaning: 'CLASS' (meaning 'class is over' as in finishing a lesson or after-school excitement), the colon ':' to signify a new chapter, & 'Why(=y) don't we enjoy same same but different music of CLASSY?', suggesting enjoying CLASSY's music which is the same K-pop but on a different level. It reflects their ambitions to break through the barriers and captivate fans worldwide with music on a whole different level.
Official Greeting: "Hello! We are CLASSy!"
Official Fandom Name: CLIKE:y (클리키)
Fandom Name Meaning: It came from the words "click" and "clique". It's combined with the words "Click", "Likey", and "Key". To "click" with someone/something with the meaning to immediately like someone/something. "Clique" = a small group of people whom shares the same interests.
Official Color: Pink
Room 1: Hyungseo
Room 2: Chaewon & Hyeju
Room 3: Riwon, Jimin, Boeun, & Seonyou
Weverse: CLASSy

Official links

Group Stats

Average height: 162.6 cm
Tallest: 173 cm · Jimin
Shortest: 156 cm · Riwon
Average age: 20.4 years
Oldest: 25 years · Hyungseo
Youngest: 18 years · Jimin

Members

Hyeju

Rank 4

Stage Name: Hyeju (혜주)
Birth Name: Hong Hye-ju (홍혜주)
Position(s): Leader, Main Dancer, Lead Rapper, Vocalist
Birthday: December 9, 2003
Age: 22 years
Zodiac Sign: Sagittarius
Height: 165 cm (5'5″)
Weight: 45 kg (99 lbs)
Blood Type: O
MBTI Type: ISFJ
Nationality: Korean

Facts

She was born in Songpa-gu, Seoul, South Korea.
She has an older sister.
Her nicknames are Puppy and Baekseolgi (White Rice Cake).
Her specialties are flexibility and dance.
Her favorite meal of the day is breakfast.
She loves coffee.
Her favorite color is black.
Her hobbies are cooking, listening to music, and dancing.
At school, she was classmates with Kep1er’s Dayeon, and they were also in the same dance team.
She is friends with Street Girls Fighter TURNS’ Nain and Heesoo, AMAZON’s Hyerim, and Newnion’s Simmon.
Hyeju’s must-have item is her purse.
She looks up to BLACKPINK’s Jisoo. (Fan Meeting, March 6, 2022)
Her My Teenage Girl ranking was 23-19-14-15-14-10-9-4.

Hyungseo

Rank 3

Stage Name: Hyungseo (형서)
Birth Name: Myung Hyung-seo (명형서)
Position(s): Lead Vocalist
Birthday: June 25, 2001
Age: 25 years
Zodiac Sign: Cancer
Height: 161 cm (5'3.5″)
Weight: 43 kg (95 lbs)
Blood Type: A
MBTI Type: ISFJ (Previously ESFJ)
Nationality: Korean

Facts

She was born in Suwon, Gyeonggi-do, South Korea.
She lived in Texas, USA, for six years.
Hyungseo has an older sister born in 1993.
She was a member of Busters.
She speaks English fluently.
Hyungseo is known as the “Happy Virus.” (CLASS:y Fan Call, March 6, 2022)
Her nicknames include Mom, Tteo, and Hyeongmyeongseo.
Her personality is bright.
Her hobbies are shopping and walking.
She is good at cooking.
She wants confidence like BLACKPINK.
Her favorite color is black.
She can play guitar.
She has a pet dog.
Hyungseo loves spicy food. (Fan Meeting, March 6, 2022)

Chaewon

Rank 7

Stage Name: Chaewon (채원)
Birth Name: Yoon Chae-won (윤채원)
Position(s): Main Vocalist
Birthday: June 4, 2003
Age: 23 years
Zodiac Sign: Gemini
Height: 161 cm (5'3.5″)
Weight: 42 kg (93 lbs)
Blood Type: O
MBTI Type: ISTP (was ESTP)
Nationality: Korean

Facts

She was born in Hanam, Gyeonggi Province, South Korea.
She has a younger brother.
Her nicknames are Baby Bunny and Chae Chae.
Her personality is quiet if she doesn’t know you well.
She likes action movies.
She is a fan of BIGBANG and SISTAR.
Her favorite color is black.
Chaewon likes R&B music.
She can play piano.
She is called the “Fake Maknae.” (Fan Meeting, March 6, 2022)
Her role models are Taeyeon and IU.

Riwon

Rank 5

Stage Name: Riwon (리원)
Birth Name: Kim Ri-won (김리원)
Position(s): Lead Dancer, Lead Vocalist
Birthday: January 11, 2007
Age: 19 years
Zodiac Sign: Capricorn
Height: 156 cm (5'1.5″)
Weight: 40 kg (88 lbs)
Blood Type: AB
MBTI Type: ISFP (Previously ESFP)
Nationality: Korean

Facts

She was born in Sang-ri, Yeoju, Gyeonggi Province, South Korea.
She has an older brother.
Riwon is a model with many endorsements.
She acted in My YouTube Diary and My Mukbang Diary.
Her nicknames are Kim Lemon and Kim RaWon.
Her personality is very active and social.
Her habit is organizing.
Her hobbies are watching dramas and collecting cute things.
She enjoys watching TikTok videos of herself and her members. (Weekly Idol Self Profile)
Riwon really likes “PTT” by LOONA.
She appeared on Toonistar.
She is friends with NewJeans’ Hyein.
Riwon is a big fan of TWICE. (Fan Meeting, March 6, 2022)
She is left-handed.
Her My Teenage Girl ranking was 4-3-5-4-5-3-4-5.

Jimin

Rank 1

Stage Name: Jimin (지민)
Birth Name: Won Ji-min (원지민)
Position(s): Lead Vocalist, Center
Birthday: November 25, 2007
Age: 18 years
Zodiac Sign: Sagittarius
Height: 173 cm (5'8″)
Weight: 51 kg (112 lbs)
Blood Type: AB
MBTI Type: ISTP (was ESFJ)
Nationality: Korean

Facts

She was born in Wonju, Gangwon Province, South Korea.
She has a younger sister.
Her nicknames are Pearl and Wonji.
Her personality is cheerful and bright. (Weekly Idol Self Profile)
Her habit is touching her hair often. (Weekly Idol Self Profile)
She loves “Black Mamba” by aespa.
Jimin admires IU.
She is good at random dance play.
Her motto is: “Never give up, just keep trying.”
She used to dislike mint chocolate but now loves it.
Members say Jimin is very confident. (Fan Meeting, March 6, 2022)
Her all-time favorite song is “Hope Not” by BLACKPINK. (Fan Meeting, March 6, 2022)
She likes bubble tea.
The song that inspired her to become an idol was Miss A’s “Bad Girl Good Girl.”
Her routine includes eating yogurt and drinking Pocari Sweat and corn silk tea.

Boeun

Rank 6

Stage Name: Boeun (보은)
Birth Name: Park Bo-eun (박보은)
Position(s): Lead Vocalist
Birthday: February 11, 2008
Age: 18 years
Zodiac Sign: Aquarius
Height: 160 cm (5'3″)
Weight: 39 kg (86 lbs)
Blood Type: O
MBTI Type: INTP (was ISTJ)
Nationality: Korean

Facts

She was born in Ulsan, South Korea.
She has an older sister.
Her nicknames are Baby, Baby Cat, and Duck. (Weekly Idol Self Profile)
Her personality varies depending on the day. (Weekly Idol Self Profile)
Her hobby is listening to music. (Weekly Idol Self Profile)
Boeun enjoys running.
She is a big fan of Hyolyn.
Three things that make Boeun happy are CLASS:y’s members, singing, and fans.
She is known as the Queen of Aegyo. (Fan Meeting, March 6, 2022)
Her role models are BLACKPINK.
Her My Teenage Girl ranking was 6-5-3-3-3-6-3-6.

Seonyou

Rank 2

Stage Name: Seonyou (선유)
Birth Name: Kim Seon-you (김선유)
Position(s): Main Rapper, Lead Dancer, Vocalist, Maknae
Birthday: March 20, 2008
Age: 18 years
Zodiac Sign: Pisces
Height: 162 cm (5'4″)
Weight: 43 kg (95 lbs)
Blood Type: B
MBTI Type: ISTP (was ISFP)
Nationality: Korean

Facts

She was born in Gangneung, Gangwon-do, South Korea.
She has an older brother and sister.
She competed on CAP-TEEN.
Her nicknames are Baby Duck and Baby Hamster. (Weekly Idol Self Profile)
Her personality is sociable all day. (Weekly Idol Self Profile)
Hobbies: Drawing, Music, & Dancing.
She is good at guessing songs.
She dislikes vegetables.
She is good at dodgeball.
She enjoys calling her friends, shopping, and relaxing.
Her specialties are skipping, figure skating, and cartwheels.
One word to describe Seonyou is “Bear,” because she eats a lot and looks like a bear when eating.
Her favorite food is malatang.
Her role model is BLACKPINK.