Hangul: 케플러

Alternative name: ケプラー

Fandom Name: Kep1ian

Fandom Color: Lavender & Yellow, Lavender & White

Origin: South Korea

Debut Date: January 3, 2022

Kep1er Members

About Kep1er

Kep1er Member Ages

Ranked from oldest to youngest.

1. YujinAug 12, 199626 years old
2. Shen XiaotingNov 12, 199923 years old
3. Sakamoto MashiroDec 16, 199923 years old
4. Kim ChaehyunApr 26, 200220 years old
5. Kim DayeonMar 02, 200320 years old
6. Ezaki HikaruMar 12, 200419 years old
7. Huening BahiyyihJul 27, 200418 years old
8. Seo Young EunDec 27, 200418 years old
9. YeseoAug 22, 200517 years old

Kep1er Member Heights

Kep1er Height Ranking

Ranked from tallest to shortest.

1. Shen Xiaoting1.68 m (5’6″)
2. Huening Bahiyyih1.67 m (5’6″)
3. Yujin1.63 m (5’4″)
4. Kim Chaehyun1.61 m (5’3″)
5. Kim Dayeon1.58 m (5’2″)
6. Seo Young Eun1.58 m (5’2″)
7. Sakamoto Mashiro1.58 m (5’2″)
8. Yeseo1.57 m (5’2″)
9. Ezaki Hikaru1.55 m (5’1″)


Kep1er is composed of nine members born between 1996 and 2005. Their names are: Sakamoto Mashiro, Kang Yeseo, Ezaki Hikaru, Seo Youngeun, Choi Yujin, Kim Dayeon, Kim Chaehyun, Shen Xiaoting and Huening Bahiyyih.

Kep1er has 6 South Korean members, 1 Chinese member, and 2 Japanese members. Kang Yeseo, Seo Youngeun, Dayeon, Choi Yujin, and Kim Chaehyun are South Korean. Huening Bahiyyih was born in Korean but is of mixed ethnicity. Ezaki Hikaru and Sakamoto Mashiro are Japanese. Shen Xiaoting is the only Chinese member.

The oldest member of Kep1er is Choi Yujin (born Aug 12, 1996). She was 25 years old when she was competing in Girls Planet 999. The youngest member is Kang Yeseo (born Aug 22, 2005). She was 16 years old when she was competing in Girls Planet 999.


The official position of leader is held by Yujin. The co-leader is Mashiro.

These are the positions of each of Kep1er’s members:

Kim Chaehyuncenter, main vocalist
Huening Bahiyyihvocalist
Choi Yujinleader, vocalist
Kim Dayeonmain dancer, rapper
Seo Youngeunvocalist, rapper, dancer
Kang Yeseovocalist, dancer, maknae
Ezaki Hikarumain rapper, dancer
Sakamoto Mashiroco-leader, lead vocalist
Shen Xiaotingvocalist, visual

Final Ranking from Girls Planet 999

These are the final rankings from Girls’ Planet 999, which determined the final members of Kep1er:

1Kim Chaehyun1,081,182
2Huening Bahiyyih923,567
3Choi Yujin915,722
4Kim Dayeon885,286
5Seo Youngeun781,657
6Kang Yeseo770,561
7Ezaki Hikaru713,322
8Sakamoto Mashiro708,149
9Shen Xiaoting700,663

Kim Suyeon ranked 10th place. Guinn Myah ranked in 11th place.

Fun Facts and Trivia

  • Girls Planet 999 had 99 contestants in total divided in three different groups with 33 contestants each: the K-Group (Korean), C-Group (Chinese), and the J-Group (Japanese).
  • Several members debuted in other groups prior to debuting with Kep1er. Kang Yeseo was part of Busters. Choi Yujin was a member of CLC. Ezaki Hikaru was a member of +GANG.
  • Several members participated in survival shows before winning Girls Planet 999. Kim Dayeon was in Produce 48. Shen Xiaoting was in Produce Camp 2020.
  • The tallest member of Kep1er is Shen Xiaoting with a height of 168 cm.
  • The shortest member of Kep1er is Ezaki Hikaru with a height of 154.5 cm.
  • There is an age gap of 9 years between the oldest member (Yujin) and the youngest member (Yeseo).
  • There is a height gap of 13 cm between the tallest member (Xiaoting) and the shortest member (Hikaru).


  • WA DA DA DA was placed for 10 hours in the number 1 position in Line Music’s Top 100 Songs. Also all the songs belonging to “FIRST IMPACT” were placed within the TOP 6 of the same Chart.
  • For the girls’ group brand reputation ranking for the month of February 2022 they ranked #8. Throughout the year: #10 January, #16 March, #15 April, #15 May, #20 June, #17 July and #25 August.



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