Kep1er

Kep1er (케플러) (also stylized as Kepler) is a 6-member K-pop project girl group formed through the Mnet survival show Girls Planet 999, managed by WAKEONE Entertainment and SWING Entertainment. The group consists of Yujin, Xiaoting, Chaehyun, Dayeon, Hikaru and Huening Bahiyyih. On September 30, 2024, the group signed a management contract with KLAP Entertainment. The group was former through the Mnet survival show Girls Planet 999. The final lineup was announced on October 22, 2021, during the final episode of Girls Planet 999. They were set to promote for 2 years and 6 months starting on their debut date. Kep1er officially debuted on January 3, 2022, with their first mini album, FIRST IMPACT. The group made their Japanese debut on September 7, 2022. Ahead of their contracts expiration, it was announced that 7 members decided to extend their contracts. The group continued as 7 members after “Kep1going On” promotions, as Mashiro and Yeseo did not renew. On July 4, 2024, Mashiro and Yeseo’s contacts officially ended, but they concluded their activities with the group after their scheduled Japanese concert, on July 15, 2024. On March 6, 2026, it was announced that Seo Youngeun had terminated her contract and Kep1er will continue as 6 member group. TAPE Unit Tropical Light Unit

Kep1er members height, age

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

Member	Height	Age
Yujin	163 cm	30 years
Xiaoting	168 cm	26 years
Chaehyun	161.5 cm	24 years
Dayeon	158 cm	23 years
Hikaru	155 cm	22 years
Huening Bahiyyih	167 cm	22 years

Former members (3)

Member	Height	Age
Youngeun	160 cm	21 years
Mashiro	158 cm	26 years
Yeseo	157 cm	21 years

Debut Date: January 3, 2022
Sun & Moon (Queendom 2: May 6, 2022)
Group Name Meaning: The "Kep" represents "catching a dream," while the "1" symbolizes the members uniting as one to strive for the best. The name also pays homage to the German astronomer Johannes Kepler and reflects the planetary and space theme introduced during their formation on the survival show Girls Planet 999.
Official Greeting: "Catch your eye, catch your mind! 안녕하세요, 케플러입니다! (Hello we are Kep1er!)"
Official Fandom Name: Kep1ian (케플리안)
Official Fandom Colors: Lavender & White
Official Colors: Lavender & Yellow

Official links

Group Stats

Average height: 162.1 cm
Tallest: 168 cm · Xiaoting
Shortest: 155 cm · Hikaru
Average age: 24.5 years
Oldest: 30 years · Yujin
Youngest: 22 years · Hikaru

Members

Yujin

Rank 3

Stage Name: Yujin (유진)
Birth Name: Choi Yu-jin (최유진)
Position(s): Leader, Vocalist
Birthday: August 12, 1996
Age: 30 years
Zodiac Sign: Leo
Chinese Zodiac Sign: Rat
Height: 163 cm (5'4″)
Weight: 42 kg (92 lbs)
Blood Type: A
MBTI Type: ENFP-T
Nationality: Korean
Representative Emoji: 🐰🍓

Facts

Yujin was born in Jeonju, North Jeolla, South Korea.
Her family includes her parents and younger brother (born 1998).
Her hobbies are pilates and watching movies.
She is a former member of CLC.
She was the oldest Korean contestant on Girls Planet 999.
Her specialty is speaking Japanese.
Her role models are her parents.
Her favorite colors are purple and white.
Her favorite animals are puppies and rabbits.
Her favorite things include mint chocolate, her phone, summer, cool weather, dipping sauce, phone calls, the sea, and fried chicken.
She considers her charm point to be her bright energy and positivity.
Her stress relievers are walking, exercising, and listening to music.
Her favorite foods include chicken feet, ramen, and cake.
She wants to appear on Running Man because she has watched it since childhood.
She hopes to do fan signs and meet fans.
Her favorite things are Kep1er, fans, family, friends, eating, and puppies.
She hates bugs.
She acted in Green Fever (Yoo Jin), Nightmare Teacher (Chun Yoo Na, guest role), and So Not Worth It (Han Hyun Ah, guest role).
Her motto on Girls Planet 999 was: “Unexpected ‘No-Exit’ charms! A master of aegyo more refreshing than lemon.”
She scored 915,722 points in the GP999 finals.
Her former company was Cube Entertainment.
Her ideal type is Nam Joo Hyuk.

Xiaoting

Rank 9

Stage Name: Xiaoting (샤오팅)
Birth Name: Shen Xiao Ting (沈小婷)
Korean Name: Shim So-jung (심소정)
Position(s): Main Dancer, Vocalist, Visual
Birthday: November 12, 1999
Age: 26 years
Zodiac Sign: Scorpio
Chinese Zodiac Sign: Rabbit
Height: 168 cm (5'6″)
Blood Type: AB
MBTI Type: ISFJ
Nationality: Chinese
Representative Emoji: 🦌
Douyin: @沈小婷

Facts

Xiaoting was born in Chengdu, Sichuan, China.
Her family includes her parents, older sister, and grandmother.
At age 14, she placed 4th in group modern dance at the 2013 CBDF China Cup Tour Finals.
She graduated from Sichuan Conservatory of Music University (Performance major).
She began training at Top Class Entertainment in 2018.
Her hobbies include movies, dramas, photography, gaming, cooking, reading, restaurants, and shopping.
Her role model is her mother.
Her specialty is dancing, especially ballroom.
She loves all colors.
Her favorite animal is a puppy.
Her favorite things include mint chocolate, her necklace, winter, all weather, sauces, texting, the sea, and seasoned chicken.
She prefers horror movies to romance.
Her stress reliever is organizing her thoughts.
She considers her charm point to be her personality and duality.
Her favorite foods include ramen, her mom’s stir-fried beef, and chewy/soft foods.
She dislikes meat fat, salad, and perilla leaves.
Her nicknames are Ting, Sojung, and Sunshine.
She competed on Produce Camp 2020, ranked 80th in episode 4, and was eliminated.
She wants to appear on Running Man because she thinks it would be fun.
She hopes to visit Namsan Tower and place love padlocks with fans.
Her favorite things include accessories, caps, socks, ramen, bags, peaches, strawberries, tteokbokki, milk, cheese, and meat.
She dislikes meat fat, sesame leaves, raw vegetables, and celery.
Her motto on Girls Planet 999 was: “Self-stunning Sunshine ★ Shen Xiaoting.”
She scored 700,663 points in the GP999 finals.
Her company is Top Class Entertainment.

Chaehyun

Rank 1

Stage Name: Chaehyun (채현)
Birth Name: Kim Chae-hyun (김채현)
Position(s): Main Vocalist, Center
Birthday: April 26, 2002
Age: 24 years
Zodiac Sign: Taurus
Chinese Zodiac Sign: Horse
Height: 161.5 cm (5'3.5″)
Blood Type: B
MBTI Type: ISTP (22/7/24)
Nationality: Korean
Representative Emoji: 🐯

Facts

Chaehyun was born in Busan, South Korea.
She dropped out of middle school at 13 to train, later passing middle and high school exams independently.
She trained at SM Entertainment for four years, then self-trained for two years.
Her specialties are singing, DIY, and Japanese.
Her hobbies include photography, gaming, movies, dramas, YouTube, reading, dancing, shopping, working out, and guitar.
Her charm points are her appearance and singing tone.
Her role model is IU.
Her favorite color is red.
Her favorite animals are white tigers, rabbits, and pandas.
Her favorite things include mint chocolate, her polaroid camera, winter, rainy weather, sauces, phone calls, the sea, and fried chicken.
Her stress reliever is shopping.
She considers her charm points to be her vocal tone and cuteness.
Her favorite foods include instant iced tea, sushi, and beef.
She dislikes raw carrots, shellfish, and olives.
Her nicknames are Chaehyun-ie and Chaerom-ie.
She is a fan of SEVENTEEN, DAY6, and SNSD’s Taeyeon.
She wants to appear on Running Man because she watched it since childhood and her mom loves it.
She hopes to eat delicious food and hold concerts with fans.
Her favorite things include mild perfume, winter, knits, puppies, rainy days, onion bagels, black sugar bubble tea, photo strips, Taeyeon, avocado sushi, and Animal Crossing.
She dislikes raw carrots, bitter gourd, clams, and organizing clothes.
She debuted as an MC on SBS MTV’s The Show.
Her motto on Girls Planet 999 was: “I am Kim Chaehyun with the looks of a rabbit and charisma of a white tiger.”
She scored 1,081,182 points in the GP999 finals.
Her company is WAKEONE Entertainment.

Dayeon

Rank 4

Stage Name: Dayeon (다연)
Birth Name: Kim Da-yeon (김다연)
Position(s): Main Dancer, Main Rapper, Vocalist
Birthday: March 2, 2003
Age: 23 years
Zodiac Sign: Pisces
Chinese Zodiac Sign: Goat
Height: 158 cm (5'2″)
Weight: 41 kg (90 lbs)
Blood Type: A
MBTI Type: ESTJ (22/8/5)
Nationality: Korean
Representative Emoji: 🐿

Facts

Dayeon was born in Seoul, South Korea.
Her charm point is an Indian dimple near her left eye when excited.
Her hobbies are walking and listening to music.
Her specialties are freestyling and dancing.
Her favorite colors are sky blue and purple; she prefers black clothing.
Her favorite animal is a puppy.
Her role model is her father.
Her favorite things include mint chocolate, her polaroid camera, handmade perfume, albums, summer, cool weather, sauces, texting, the sea, and spicy fried chicken.
Her stress reliever is walking while listening to happy songs.
She considers her charm point to be her personality, which differs from first impressions.
Her favorite foods include pork kimchi stew, sushi, and samgyeopsal.
She dislikes shellfish such as oysters and mussels.
Her nickname is Kongsoonie.
She considers leadership one of her strengths, shown during Girls Planet 999.
In Kep1er’s first VLive, it was revealed she can sleep anywhere and in strange positions.
She competed on Produce 48, ranked 70th in episode 5, and was eliminated.
Dayeon is attending the School of Performing Arts Seoul (SOPA).
She wants to appear on Knowing Bros because she thinks it would be fun and help promote Kep1er.
She would like to chat and take photos with fans.
Her favorite activities include listening to pop songs, walking, eating delicious food, visiting Hangang, hiking, and shopping.
She dislikes staying at home and clams.
Her motto on Girls Planet 999 was: “A top expert squirrel in idol studies with leadership! Trust professor Da Yeon.”
She scored 885,286 points in the GP999 finals.
Her company is Jellyfish Entertainment.

Hikaru

Rank 7

Stage Name: Hikaru (히카루)
Birth Name: Ezaki Hikaru (江崎ひかる)
Position(s): Main Dancer, Main Rapper, Vocalist
Birthday: March 12, 2004
Age: 22 years
Zodiac Sign: Pisces
Chinese Zodiac Sign: Monkey
Height: 155 cm (5'1″)
Blood Type: O
MBTI Type: ESFJ
Nationality: Japanese
Representative Emoji: 🐶

Facts

Hikaru was born in Fukuoka, Japan.
Her hobby is relaxing in hot springs.
Her specialties are eating delicious food and rapping.
Her charm point is her smile, which resembles a sloth.
She is the only member who dislikes Hawaiian pizza.
Her favorite colors are purple and yellow.
Her favorite animal is a monkey.
Her role model is CL.
Her favorite things include mint chocolate, her beanie, spring, windy weather, sauces, texting, the sea, and seasoned chicken.
Her stress reliever is confiding in close friends.
She considers her charm point to be her contrasting on- and off-stage persona.
Her favorite foods include soboro rice, yukhoe, and cucumber.
She dislikes cheese, milk, and soy milk.
Her nicknames are Hichan and Karu.
She was part of the kid trainee duo +GANG (2016-2018).
She wants to appear on Running Man because she enjoys watching it.
She hopes to eat and talk with fans.
Her favorite item is a suit.
Her motto on Girls Planet 999 was: “I’m Hikaru - a vitamin with a healing smile and unique rap that leaves a strong impact.”
She scored 713,322 points in the GP999 finals.
Her company is Avex.

Huening Bahiyyih

Rank 2

Stage Name: Huening Bahiyyih (휴닝바히에)
Birth Name: Bahiyyih Jaleh Huening (바히에 자레 휴닝)
Korean Name: Jung Bahiyyih (정바히에)
Position: Vocalist, Maknae
Birthday: July 27, 2004
Age: 22 years
Zodiac Sign: Leo
Chinese Zodiac Sign: Monkey
Height: 167 cm (5'5.5″)
Blood Type: A
MBTI Type: ESFJ
Nationality: Korean-American
Representative Emoji: 🦁

Facts

She was born in South Korea.
Her family includes her father (Nabil David Huening), mother, older brother Huening Kai, and older sister Lea.
Her charm point is her tall nose.
Her hobbies are bullet journaling and shopping.
Her favorite colors are yellow and sky blue.
Her favorite animal is a puppy.
Her favorite things include mint chocolate, perfume, spring weather, sauces, texting, the sea, and fried chicken.
She prefers ice cream over cake.
Her stress reliever is writing in her diary.
Her charm point is her single dimple.
Her favorite foods are pasta, chicken, and fruit.
She dislikes eggplant, olives, and shiitake mushrooms.
Her nicknames are Hee-i and Passionate Fairy.
She likes to try everything, even if she doesn’t know how.
She dislikes lack of enthusiasm and effort.
She and Kang Yeseo attend Lila Arts High School.
She was the English narrator at the 2020 Mnet Asian Music Awards (Worldwide Fans Choice).
Her role model is Ariana Grande.
In Kep1er’s first VLive, she said she would like to be Mashiro (for knowing Korean and Japanese) or Chaehyun (for her beautiful voice).
She wants to appear on Weekly Idol because she enjoys watching it.
She hopes to hold fan meetings and concerts.
Her favorite things include pasta, fruit, chocolate, pop songs, spring, and shopping.
She dislikes bugs, eggplant, avocado, and making her bed.
Her motto on Girls Planet 999 was: “Full of energy! A majestic Pokémon Charmander!”
She scored 923,567 points in the GP999 finals.
Her company is IST Entertainment (formerly PlayM).

Former member

Youngeun

Rank 5

Stage Name: Youngeun (영은)
Birth Name: Seo Young-eun (서영은)
Position(s): Main Vocalist, Dancer, Maknae
Birthday: December 27, 2004
Zodiac Sign: Capricorn
Chinese Zodiac Sign: Monkey
Height: 159 cm (5'3″) / Real Height: 158 cm (5'2″)
Blood Type: A
MBTI Type: INFP (220621)
Nationality: Korean
Representative Emoji: 🦊

Facts

Youngeun was born in South Korea.
Her family includes her parents and two older sisters.
Her hobbies are covering choreographies and collecting perfumes.
Her specialties are boy group and hip-hop dances.
She knows taekwondo and baseball.
She can perform various dance styles.
She trained at ModernK Music Academy.
She was a backup dancer for DreamNote.
Her favorite colors are burgundy and gray.
Her favorite animal is a puppy.
Her role model is BTS.
Her favorite things include mint chocolate, wristwatches, autumn, breezy weather, sauces, texting, mountains, and fried chicken.
Her stress relievers are music, dancing, and fresh air.
She considers her charm point to be her “spicy” stage presence and “mild” off-stage personality.
Her favorite foods include chicken feet, tripe, and oxblood.
She dislikes eggplant and salmon boiled radish.
Her nickname is Yeo-eun.
She wants to appear on Running Man, Knowing Bros, and Tingle Interview.
She hopes to do fan signs, fan meetings, concerts, and karaoke with fans.
Her favorite things include challenges, success, assurance, chicken feet, gopchang, perfume, and scarves.
She dislikes fear, weakness, salmon, spiders, and wet things.
On Mar 7, 2023, it was announced her father passed away, leading to a hiatus. She resumed schedules on Mar 18, 2023, appearing in an Instagram Live.
Her motto on Girls Planet 999 was: “I am attractive Seo Youngeun with powerful dance and smile.”
She scored 781,651 points in the GP999 finals.
Her company is Biscuit Entertainment.
On Jul 14, 2025, KLAP announced she would take a temporary hiatus for health reasons.
On Mar 6, 2026, it was announced she concluded her activities with Kep1er.

Mashiro

Rank 8

Stage Name: Mashiro (마시로)
Birth Name: Sakamoto Mashiro (坂本舞白)
Position(s): Co-Leader, Vocalist
Birthday: December 16, 1999
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Rabbit
Height: 158 cm (5'2″)
Blood Type: AB
MBTI Type: ISFP (220302)
Nationality: Japanese
Representative Emoji: 🦝

Facts

Mashiro was born in Tokyo, Japan.
She is an only child.
Her hobbies are playing with her cat and walking.
Her specialties are cooking, dancing, and staying still without thinking.
She trained at JYP Entertainment for a long time, so she speaks Korean fluently.
She trained at JYP (2016-2018), Pledis (2019-2020), and joined 143 Entertainment in 2021.
She has acrophobia (fear of heights).
She was voted leader in every team she joined on Girls Planet 999.
Her role model is BLACKPINK.
In Kep1er’s first VLive, she said she is learning a new language, possibly Mandarin.
Her favorite colors are purple and blue.
Her favorite animal is a cat.
Her favorite things include mint chocolate, ring beads, bracelets, pillows, winter, good walking weather, sauces, phone calls, the sea, and fried chicken.
Her stress reliever is sleeping.
Her charm point is her dimple.
Her favorite foods include omelets, fish cutlets, and sandwiches.
She dislikes sea urchin roe, acorns, and jelly salad with coriander.
Her nicknames are Shiro and Mashmallow.
Mashiro is very close with the members of ITZY, as she previously trained with them for 2 years.
She wants to appear on Knowing Bros and Amazing Saturday because they are fun and feature famous guests.
She hopes to hold fan meetings, fan signs, and travel with fans.
Her favorite activity is sleeping.
She dislikes heights, ghosts, scary things, and bugs.
Her motto on Girls Planet 999 was: “Charming marshmallow from overseas.”
She scored 708,149 points in the GP999 finals.
On May 30, 2024, it was announced she would end her Kep1er activities after Kep1going On promotions.
She is currently a member of MADEIN.
Her company is 143 Entertainment.

Yeseo

Rank 6

Stage Name: Yeseo (예서)
Birth Name: Kang Ye-seo (강예서)
Position(s): Vocalist, Maknae
Birthday: August 22, 2005
Zodiac Sign: Leo
Chinese Zodiac Sign: Rooster
Height: 157 cm (5'2″)
Weight: 43 kg (94 lbs)
Blood Type: A
MBTI Type: ENFP
Nationality: Korean
Representative Emoji: 🐰

Facts

She was born in Incheon, South Korea.
Her family includes her parents and older brother.
Her hobbies are drawing, reading webtoons, and watching movies.
Her favorite color is light purple.
Her favorite animal is a puppy.
Her favorite things include mint chocolate, notebooks, books, spring, cool windy weather, sauces, phone calls, the sea, and fried chicken.
Her stress reliever is sleeping.
Her charm point is her rabbit-like eyes.
Her role models are her parents.
Her favorite foods include cold bean soup noodles, tomato spicy seafood noodles, and pork backbone stew.
She dislikes eggplant, mussels, and jellyfish.
Her nicknames are The-Last-Yeseo, Ye-chin, and Ye-jjin.
She and Huening Bahiyyih attend Lila Arts High School.
She is classmates with Chaeyun, a former Girls Planet 999 contestant.
She is skilled at finger training, with a very flexible right-hand finger.
She has acted in dramas and films including Fighting Family (2012), Miracle in Cell No. 7 (2013), Sprout (2013), One Step (2017), and Diary of a Prosecutor (2020).
She was a member of Busters Beta under TG Entertainment and Marbling E&M Inc. (joined Feb 1, 2019).
She was also in the kid girl group CutieL.
She wants to appear on Running Man because she has enjoyed it since childhood.
She hopes to do fan signs with fans.
Her favorite things include noodles, movies, members, family, drawing, and fans.
She dislikes bugs.
Her motto on Girls Planet 999 was: “Lovely Ye Seo twinkling like a jewel.”
She scored 770,561 points in the GP999 finals.
On May 30, 2024, it was announced she would end her Kep1er activities after Kep1going On promotions.
She is currently a member of MADEIN.
Her company is 143 Entertainment.