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"When I achieve my dreams, I’ll become someone’s else dream."

Stage Name: Seeun (세은)
Birth Name: Yoon Se Eun (윤세은)
Position: Vocalist
Birthday: June 14, 2003
Zodiac Sign: Gemini
Chinese Zodiac Sign: Goat
Nationality: Korean (born in Pyeongtaek, Gyeonggi)
Height: 166 cm (5’5″)
Blood Type: A
Object: Light
MTBI: INFP
Official animal: Dessert fox

Seeun Info:– Seeun, along with Sieun and Sumin, was revealed first, making them the High Up Girls.
– She trained for 2 years and 7 months.
– Specialty: Running, flute.
– She joined High Up in 2019.
– She, Sieun, Isa and J used to be roommates, now she's roomate with Isa.
– She has a cat named Richie that she's often posting about.
– She is good at cooking.
– She and Isa have the same height.
– She’s in charge of aegyo.
– She’s a former pre-debut member of Play M Girls, now known as Weeekly.
– Hobby: Collecting stickers, listening to music.
– She is left handed.
– She was a child actress under KIANA ent.
– Charming Point: Smile
– She once posted 32 selfies in one day.
– She went viral on Korea for being the girl in a school textbook during pre debut.SEEUN TRHOUGH TIME
(click to open full size)-Pre debut
-Star To A Young Culture
-Staydom
-Stereotype
-YOUNG-LUV.COM

SEEUN CONTENT- Prologue Film: Seeun
- Practice video: Seeun
- Monster - IRENE&SEULGI (Sieun & Seeun Dance Cover)
- Pre-debut vlog w/ Sumin & Sieun
- Predebut Diabetes awareness campaign
- Kill This Love - BLACKPINK (Seeun dance cover)

"If you don’t walk today, you have to run tomorrow”.

Stage Name: Yoon (윤)
Birth Name: Sim Ja Yun (심자윤)
Position: Lead Vocalist
Birthday: April 14, 2004
Zodiac Sign: Aries
Chinese Zodiac Sign: Monkey
Nationality: Korean (born in Gwanju, Jeolla-do)
Height: 170 cm (5’6.9″)
Blood Type: A
Object: Metal
MTBI: ENFP
Official animal: Baby tiger

Yoon info:– She was introduced on October 15, 2020.
– She and Sumin used to be roommates, now she's roommates with J.
– Favorite color: Yellow.
– Her favorite food is steamed eggs cooked by her grandmother.
– She is the tallest member.
– She's a fan of BTOB since pre debut.
– Role Model: BLACKPINK‘s Lisa.
– Specialty: guessing mystery quiz.
– Hobby: playing games.
– Charming Point: hair.
– Yoon often goes viral because of her visuals
– She's a big fan of (g) i-dle and even have a Neverland fanship card.YOON TRHOUGH TIME
(click to open full size)-Pre debut
-Star To A Young Culture
-Staydom
-Stereotype
-YOUNG-LUV.COM

YOON CONTENT- Prologue Film: Yoon
- Practice video: Yoon
- Naughty - Irene & Seulgi (Yoon dance cover)

"The sweat I shed will soon have a result.”

Stage Name: J (재이)
Birth Name: Jang Ye Eun (장예은)
Position: Vocalist, Rapper, Maknae
Birthday: December 9, 2004
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Monkey
Nationality: Korean (born in Daejeon, Chungcheong)
Height: 168 cm (5’6″)
Blood Type: O
Object: Wind
MBTI: INFJ
Official animal: Soft maltese

J info:– She was introduced on October 14, 2020.
– She’s a fan of Dua Lipa.
– Role Model: Jessi.
– She is good at drawing.
– Hobby: dealing with STAYC, visits the fancafe, drawing.
– She loves snacks.
– She, Sieun, Isa and Seeun used to be roommates, now she's roommates with Yoon.
– Charming Point: hair, low-pitched voice.
– She’s the youngest member.
– She went viral in South Korean for getting locked inside a convenience storeJ TRHOUGH TIME
(click to open full size)-Pre debut
-Star To A Young Culture
-Staydom
-Stereotype
-YOUNG-LUV.COM

J CONTENT- Prologue Film: J
- Practice video: J
- Summer Nostalgia - 415 (Sieun & J cover)
- Don't Start Now - Dua Lipa (cover)
- IF - Taeyeon (cover)