OURBIRTHDAY Members Profile and Facts
OURBIRTHDAY (아워벌스데이) or OBD (오비디) is a seven-member girl group produced by INNIT Entertainment (subsidiary label of JYP Entertainment). The group consists of Cho Hyejin, Kuk Chorok, Shin Hyewon, U, Baby, Achiraya, and Kilala. On July 22, 2026,  Cho Hyejin, Baby, and Achiraya debuted with the first version of the pre-debut track “HUNGRY (Side A)”, and Kuk Chorok, Shin Hyewon, U, and Kilala debuted with the second version of the same pre-debut track “HUNGRY (B-side)”. The full group officially debuted with the title track “SQUEEZY” on August 19, 2026.

OURBIRTHDAY Name Meaning: When the members are together, every day feels as happy and special as a birthday.
OURBIRTHDAY Official Greeting: Today is our birthday! Hello, we are OURBIRTHDAY!

OURBIRTHDAY Fandom Name: N/A
OURBIRTHDAY Official Color: N/A

OURBIRTHDAY Logo:

Latest Dorm Arrangement (Updated August 2026):
Room 1 (Single room): Hyewon
Room 2: Baby & Kilala
Room 3: Chorok, Hyejin, U & Achiraya

Official SNS:
Instagram: @ourbirthday_official
X: @OBD_offcl
TikTok: @ourbirthday_official
YouTube: OURBIRTHDAY
Facebook: OURBIRTHDAY
Fans: OURBIRTHDAY
Weibo: OURBIRTHDAY
Bilibili: OURBIRTHDAY
Douyin: OURBIRTHDAY

OURBIRTHDAY Member Profiles:
Cho Hyejin

Stage Name: Cho Hyejin (조혜진)
Birth Name: Cho Hye-jin (조혜진)
Position(s): Leader, Main Dancer
Birthday: October 24, 2007
Zodiac Sign: Scorpio
Chinese Zodiac Sign: Pig
Height: 163 cm (5’3″)
Weight: N/A
Blood Type: N/A
MBTI Type: ENFJ
Nationality: Korean
Representative Color: Mantis Green
Representative Emoticon: 🍃 (Matcha)
WHIP! Avatar: Groovlu (그루블루)

Cho Hyejin Facts:
– She was born in Seongha-dong, Sangju, Gyeongsangbuk-do, South Korea.
– Hyejin was a former member of the pre-debut girl group DDD25 along with U after ranking first in THE DDANDDARA. The group is presumed to have disbanded without debuting in late 2025, following a prolonged period of inactivity and the members’ subsequent debuts in different acts under the agency.
– She was a contestant on Street Dance Girls Fighter 2, and was eliminated in the fourth episode, placing sixth with her dance crew, LACHICA.
– She is a Hanlim Department of Practical Dance graduate.
– She dreamed of going to an arts high school after watching a drama called Dream when she was a kid.
– She likes to go to karaoke with friends.
– She has a dog named Kong (콩).
– She thinks brown hair doesn’t suit her.
– Hyejin is a reflective person, thinking deeply about herself and how she can help her members as much as she can as leader.
– Her specialty is dancing.
– Hyejin’s favorite numbers are 5 and 24.
– Her favorite season is Winter.
– Her favorite jacket is a denim one, gifted and handed down by her mom who used to wear it when she was Hyejin’s age.
– She joined INNIT Entertainment on January 24, 2025.
– Hyejin was part of HUNGRY (SIDE A)’s single and promotions.
See more facts about Cho Hyejin…

Kuk Chorok

Stage Name: Kuk Chorok (국초록)
Birth Name: Kuk Cho-rok (국초록)
Position(s): N/A
Birthday: July 28, 2005
Zodiac Sign: Leo
Chinese Zodiac Sign: Rooster
Height: 163 cm (5’3″)
Weight: N/A
Blood Type: N/A
MBTI Type: ESTP
Nationality: Korean
Representative Color: Opium Brown
Representative Emoticon: 🍪 (Cookie)
WHIP! Avatar: Cappusia (카푸시아).

Chorok Facts:
– She was born in Gwacheon-si, Gyeonggi-do, South Korea.
– She was a PLEDIS trainee from 2018 to 2025, being one of the final candidates for the PLEDISNGG line-up.
– She trained alongside the NewJeans members during her trainee period.
– Her name means “Green” in Korean.
– She loves collecting cute stickers for her phone cases.
– Her favorite season is Autumn.
– She hates rainy days.
– She dislikes mint chocolate.
– She has a warm, laid-back vibe.
– A good night sleep melts her stress away.
– She’s calm and stable no matter the situation.
– She likes walking down on a sunny street with her sunglasses on.
– Chorok’s surname is rare in South Korea.
– Her hobbies are watching animations and playing baseball. (Source)
– Her speciality is cutting fruits. (Source)
– Her nickname is Roksil. (Source)
– The hashtags that represents her are #eyesmile, #clover and #summergirl.
– The dish she wants to eat the most is a pizza with sweet potato cheese crust. (Source)
– Chorok was part of HUNGRY (SIDE B)’s single promotions.

Shin Hyewon

Stage Name: Shin Hyewon (신혜원)
Birth Name: Shin Hye-won (신혜원)
Position(s): Vocalist
Birthday: October 5, 2005
Zodiac Sign: Libra
Chinese Zodiac Sign: Rooster 
Height: 160 cm (5’2″)
Weight: N/A
Blood Type: O
MBTI Type: ISFP
Nationality: Korean
Representative Color: Saffron Yellow
Representative Emoticon: 🧀 (Cheese)
WHIP! Avatar: Hapumi (하푸미).

Shin Hyewon Facts:
–  She was born in Hwawon-myeon, Haenam-gun, Jeollanam-do, South Korea.
– She has a younger brother.
– She was a contestant in R U Next?, being eliminated in episode 7 as she was ranked 15th.
– Her hobbies are listening to music and dancing.
– She joined BE:LIFT in 2021, but left in 2024.
– Hyewon took dance classes at LAMF Dance Academy, PinkM Academy, and ARoot Academy.
– She has a habit of blinking a lot.
– She has a dog named Byeol, meaning “Star” in Korean.
– She is close to ILLIT member Minju and Wonhee.
– She was a member of Little Cheer Girl under the stage name Rael.
– She joined INNIT Entertainment in October 2025.
– She has a weird face while focusing.
– She has a cosy vibe, as she describes herself as a “total homebody” and “is happiest when in bed”.
– She loves to eat fried chicken.
– She calls herself a “journaling pro” and loves to decorate her journal colorfully.
– Hyewon was part of HUNGRY (SIDE B)’s single promotions.
See more facts about Shin Hyewon…

U

Stage Name: U (유)
Birth Name: Kawasaki Yu (川崎優)
Position(s): Rapper
Birthday: August 21, 2008
Zodiac Sign: Leo
Chinese Zodiac Sign: Rat
Height: N/A
Weight: 158 cm (5’1″)
Blood Type: N/A
MBTI Type: INFJ (Previously INFP)
Nationality: Japanese 
Representative Color: Carmine Brown 
Representative Emoticon: 🍮 (Tiramisu)
WHIP! Avatar: Tirumico (티루미코).

U Facts:
– She was born in Chiba, Japan.
– She participated in two survival shows: Universe Ticket (eliminated in episode 4) and THE DDANDDARA (ranked third place).
– She was part of the pre-debut group DDD25 along with Hyejin. The group is presumed to have disbanded without debuting in late 2025, following a prolonged period of inactivity and the members’ subsequent debuts in different acts under the agency.
– She enjoys dancing to various types of music and has fun with it.
– Her specialty is thinking of unique ideas that no one else has thought of, and has a big imagination.
– She expresses her creativity through custom t-shirts, making them when she can’t find the clothes she wants.
– Music is her lucky charm.
– U has a dog.
– She attended NEXTinDANCE Academy and SONA Dance School.
– She speaks Japanese, Korean, and English.
– U is friends with ERG‘s Ai.
– She is very expressive and tends to show her emotions more than others.
– She joined INNIT Entertainment on January 24, 2025.
– Her nickname is Yu-chan.
– Her birth name, Yu, means “kindness” in Japanese.
– Her favorite season in Autumn.
– She enjoys meditating, even in noisy places.
– U was part of HUNGRY (SIDE B)’s single promotions.
See more facts about U…

Baby

Stage Name: Baby (베이비)
Birth Name: Hsieh Chia-Hsuan (謝佳軒)
Position(s): Main Dancer 
Birthday: February 10, 2009
Zodiac Sign: Aquarius
Chinese Zodiac Sign: Ox
Height: 160.7 cm (5’2″)
Weight: N/A
Blood Type: N/A
MBTI Type: INTJ
Nationality: Taiwanese
Representative Color: Pink
Representative Emoticon: 🍒 (Cherry)
WHIP! Avatar: Cherysha (체리시아)

Baby Facts:
– She was born in Kaohsiung, Taiwan.
– Baby has an older sister.
– She was a child model and a trainee at Source Music. In said company, she was also a member of their pre-debut group.
– Baby has been close friends with UNCHILD member Na Haeun since childhood.
– She is a former member of a cancelled U.SSO project.
– She also goes by Jia or Jiaqi.
– Her English stage name Angela Baby is an alias given by her mother. She was named Baby after the Chinese actress Yang Ying who goes by the stage name Angelababy.
– She loves taking close up photos where only her face is visible on the phone screen.
– She likes the Minions, and loves to greet her members and fans with “Bello”.
– Baby loves to add many extra letters on the end of her words when she types.
– When Baby was young, her mother said that she looked like a baby and gave it to her as a nickname.
– Hyejin gave Baby the nickname “Begwangbe” (베광베)
– She loves babies, and once she debuts thinks it would be fun to take care of a baby with the members.
– Baby is a free-spirited person.
– Her most confident dish is rolled omelet.
– She has a cute and hip vibe.
– Though she’s chic with a straight face, she’s full of cuteness when she smiles.
– Her camera roll is full of selfies with endless expressions.
– Baby also has a kitten-like charm, and resembles a cat.
– She likes capturing special moments with her camera.
– She wanted to be an idol after watching a lot of K-pop videos when she was young. (Source)
– Her hobbies are sleeping, watching movies and filming something novel. (Source)
– Baby was part of HUNGRY (SIDE A)’s single and promotions.

Achiraya

Stage Name: Achiraya (아치라야)
Birth Name: Achiraya Karwinwit (อชิรญา การ์วินวิท)
Position(s): Vocalist
Birthday: August 18, 2009
Zodiac Sign: Leo
Chinese Zodiac Sign: Ox
Height: 164 cm (5’3″)
Weight: N/A
Blood Type: N/A
MBTI Type: ESFP
Nationality: Thai
Representative Color: Medium Purple
Representative Emoticon: 🫐 (Blueberry)
WHIP! Avatar: I-Yat (아이얏)

Achiraya Facts:
– She was born in Thailand.
– She was a trainee at ABYSS Entertainment.
 – Her nicknames are Achichi, Chichi, Achi, and also Nong, which means “little sister” in Thai.
– She was a back dancer at the BamBamAREA52inBKKDAY2 event in 2023.
– Her gaze tends to drop downward, whenever her confidence dips or not.
– The dish she’s best at cooking is egg fried rice, with the exact same recipe which her mom used to make for her every morning before school.
– Hyejin calls her the “Vitamin” of the group.
– Achiraya was part of HUNGRY (SIDE A)’s single and promotions.
– Achiraya is a positive person.
– Her hobbies are watching and filming Mukbang videos. (Source)
– Her energy drops when she’s alone but she glows when she’s with her members.
– Her expressions instantly change based on her mood.
– Achiraya has a cute habit of resting her chin when she’s thinking.
– She possesses puppy keyrings on her bag.
– She wanted to be an idol after watching a BLACKPINK‘s choreography video when she was young. She was captured by the way the group enjoyed being on stage. (Source)
– Her specialities are eating a lot, filming good rice cake videos, playing piano and doing gymnastics. (Source)
– The hashtags that represents her are #megakong, #humanvitamin and #positiveenergy. (Source)
– After her debut, she wants to perform on various stages in front of the fans and try airport styles. (Source)
– Achiraya was part of HUNGRY (SIDE A)’s single and promotions.

Kilala

Stage Name: Kilala (키라라)
Birth Name: Takashima Kirara (高島きらら)
Position(s): Maknae, Visual
Birthday: December 17, 2010
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Tiger
Height: 160 cm (5’2″)
Weight: N/A
Blood Type: N/A
MBTI Type: ENFP
Nationality: Japanese
Representative Color: Light Coral
Representative Emoticon: 🍓 (Strawberry)
WHIP! Avatar: Kirakle (키라클레)

Kilala Facts:
– She was born in Japan.
– Her nicknames are Lala, Laraki, Kit-chan and Pink princess. (Source)
– She wanted to be an idol after finding TWICE’s social media. She said they were cool and was captured by their amazing teamwork, so she auditioned and passed. (Source)
– She was a trainee of JYP Entertainment.
– She is recognized for her dancing skills.
– She is close to the members of CIIU, a boy group that debuted under JYP China.
– She ranked third place in the women’s in classical ballet at the Japan Ballet Competition 2021.
– Hyejin thinks that Kilala’s lookalike animal is a raccoon because of her egg-shaped face and round eyes.
– Her hobbies are shopping, talking, watching animations. (Source)
– Her new hobby is teasing Hyejin.
– She has a cute and bright vibe.
– She loves the color pink and pink items.
– Her eyes sparkle when she sees new makeup products.
– She likes checking her smile in her hand mirror.
– Her speciality are ballet dancing and playing piano. (Source)
– Hashtags that represents her: #OURBIRTHDAY’smaknae, #pinkprincess and #strawberrycake. (Source)
– Kilala was part of HUNGRY (SIDE B)’s promotions.

Note 1: Please don’t copy-paste the content of this page to other sites/places on the web. If you use info from our profile, please kindly put a link to this post. Thanks a lot!  – Kprofiles.com

Note 2:
– Cho Hyejin’s leader position was confirmed on their Spotify note and this tape.
– Cho Hyejin’s and Baby’s main dancer positions were confirmed on this showcase video.
– Shin Hyewon’s and Achiraya’s vocalist positions were confirmed on this showcase video.
– U’s rapper and Kilala’s visual positions were confirmed on this Idol Radio video.

Note 3:
– All members’ MBTI types were confirmed on this source.
– U’s MBTI was updated according to this source.
– All the members heights were confirmed and updated according to this tweet: Makestar Fansign (Aug 21, 2026).

Note 4: Their latest dorm arrangement was confirmed on this live.

For reference on MBTI types:
E = Extroverted, I = Introverted
N = Intuitive, S = Observant
T = Thinking, F = Feeling
P = Perceiving, J = Judging

Made by: tylonger18 & 지씨
(Special thanks to: seulcity, ST1CKYQUI3TT, brightliliz, LIKEYLIKEY_ !!)

Latest Official Korean Release:

Who is your OURBIRTHDAY bias? Do you know more facts about them? Feel free to comment below. 🙂