POLARIS:

Eunjung

Position: Leader, dancer, and lead vocalist. 
Birth Name: Choi Eunjung
Date Of Birth: 14/04/1996 (aged 17 at the beginning of the story)
Nationality: English-Korean
Training Since: February 2011 (aged 15)

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Chaerin

Position: Lead vocalist. 
Birth Name: Kwon Chaerin
Date Of Birth: 30/04/1996 (aged 17 at the beginning of the story)
Nationality: American-Korean
Training Since: January 2012 (aged 16)

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Gayoon

Position: Main vocalist and lead dancer. 
Birth Name: Kim Yuri
Date Of Birth: 26/05/1995 (aged 18 at the beginning of the story)
Nationality: Korean (South Korea)
Training Since: April 2012 (aged 17)

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Jimin 

Position: Main vocalist and visual of Polaris. 
Birth Name: Lee Jimin
Date Of Birth: 01/01/1996 (aged 18 at the beginning of the story)
Nationality: Korean (South Korea)
Training Since: June 2011 (aged 15)

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Seohyeon

Position: Lead dancer, vocalist, rapper and maknae of Polaris, and PoleStar overall. 
Birth Name: Yoon SeoHyeon
Date Of Birth: 10/02/1998 (aged 15 at the beginning of the story)
Nationality: Korean (South Korea)
Training Since: February 2011 (aged 13)

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Subin

Position: Lead rapper and eldest of Polaris. 
Birth Name: Park Subin
Date Of Birth: 05/11/1994 (aged 18 at the beginning of the story)
Nationality: Korean (South Korea)
Training Since: January 2013 (aged 17)

 

SIGMA

Bokyung

Position: Leader and lead vocalist. 
Birth Name: Kim Bokyung
Date Of Birth: 23/11/1994 (aged 19 at the beginning of the story)
Nationality: Canadian-Korean
Training Since: January 2012 (aged 18)

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Akemi

Position: Lead vocalist and maknae. 
Birth Name: Itou Akemi
Date Of Birth: 03/02/1998 (aged 15 at the beginning of the story)
Nationality: Japanese
Training Since: October 2010 (aged 12)

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Kiyomi

Position: Main vocalist. 
Birth Name: Takahashi Kiyomi
Date Of Birth: 01/07/1996 (aged 16 at the beginning of the story)
Nationality: Japanese
Training Since: October 2010 (aged 14)

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Minjung

Position:  Leader and lead vocalist . 
Birth Name: Choi Minjung
Date Of Birth: 03/02/1995 (aged 17 at the beginning of the story)
Nationality: Korean
Training Since: January 2014 (aged 18)

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Kin

Position: Lead dancer, vocalist, rapper and eldest of Sigma. 
Birth Name: Zhang Meihui
Date Of Birth: 16/04/1993 (aged 19 at the beginning of the story)
Nationality: Chinese
Training Since: April 2009 (aged 16)

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Hyojin

Position: Lead rapper, lead dancer and visual of Sigma. 
Birth Name: Kim Hyojin
Date Of Birth: 21/06/1994 (aged 18 at the beginning of the story)
Nationality: Korean
Training Since: April 2012 (aged 18)