Insoo

Stage Name: Insoo (인수)
Birth Name: Chang Insoo (창인수​)
Position: Lead rapper (low)
Birthday: December 3
Age: ​21
Zodiac sign: Sagittarius 
Height: 170 cm 
Weight: 66 kg
Blood Type: B 

Kota

Stage Name: Kota (코타)
Birth Name: Yokota Heiji (横田平治 / (헤이지 요코타)
Position: Dancer, vocals
Birthday: December 24
Age: 20
Zodiac sign: Sagittarius​
Height: 182 cm
Weight: 62 Kg
Blood Type: O

Kota facts:
Born: Tokyo, Japan
Family: father, mother

Seungjin

​Stage Name:  Seungjin (승진)
Birth Name: Lee Seungjin (이승진)
Position: Visual, Dancer, vocals
Birthday: April 20
Age: 18
Zodiac sign: Aries
Height: 180 cm
Weight: 70 kg
Blood Type: AB

Seungjin facts:
Born: Seoul, South Korea
Family: father (Chairman of Atlantis), mother, older brother (Vice Chairman of Atlantis),
older sister (Vice Chairwoman of Atlantis)
Former member of Bright Boys

​Wonseok

Stage Name: Wonseok (원석)
Birth Name: Hong Wonseok (홍원석)
Position: Vocals, maknae
Birthday: August 22
Age: 17
Zodiac sign: Leo
Height: 176 cm
Weight: 65 Kg
Blood Type: AB

Wonseok facts:
Born: Jeju, South Korea
Family: father, twin brother (Hong Wooseok)