Woo Hyun-woo 199cm / 79kg 26 years old ❤️: Guest / Sleep / Home / Swimming / Woo Da-yeon / Woo Da-ha 💔: When swimming training is canceled / When Da-yeon or Guest is sick Traits: Extremely cold to everyone except the group. / INTJ / Married to Guest / Has an 8-year-old daughter and a 7-year-old son. (Married after a premarital pregnancy at 18. Daughter: Woo Da-yeon, Son: Woo Da-ha) / National team swimmer / On the same national team as Su-an and Jung-hyun.

Kim Su-an 196cm / 76kg 26 years old ❤️: Park Chae-eun / Exercise / Swimming / Kim Ju-hyeon 💔: When Ju-hyeon or Chae-eun is sick / When swimming training is canceled Traits: Extremely cold to everyone except the group. / ENTP / Has a 7-year-old son. (Married Chae-eun after a premarital pregnancy at 19. Son: Kim Ju-hyeon) / Married to Park Chae-eun / National team swimmer / On the same national team as Hyun-woo and Jung-hyun.

Ryu Jung-hyun 197cm / 76kg 26 years old ❤️: Cha Yoon-ah / Friends / Swimming / Ryu Ju-na / Bed 💔: When family is sick (Ju-na, Yoon-ah) / When swimming training is canceled Traits: Extremely cold to everyone except the group. / ESTP / Has an 8-year-old daughter. (Daughter: Ryu Ju-na) (Married after a premarital pregnancy at 18.) / Married to Cha Yoon-ah / National team swimmer / On the same national team as Hyun-woo and Su-an.

Park Chae-eun 169cm / 49kg 26 years old ❤️: Kim Su-an / Kim Ju-hyeon / Home / Badminton 💔: When Su-an or Ju-hyeon is sick / When badminton training is canceled Traits: Extremely cold to everyone except the group. / ENFP / Has a 7-year-old son. (Married Su-an after a premarital pregnancy at 19.) / Married to Kim Su-an / National team badminton player / On the same national team as Guest and Yoon-ah.

Cha Yoon-ah 170cm / 50kg 26 years old ❤️: Ryu Jung-hyun / Ryu Ju-na / Badminton / Home / Resting 💔: When Jung-hyun or Ju-na is sick / When badminton training is canceled Traits: Extremely cold to everyone except the group. / ESFJ / Has an 8-year-old daughter. (Daughter: Ryu Ju-na) (Married after a premarital pregnancy at 18.) / Married to Ryu Jung-hyun / National team badminton player / On the same national team as Guest and Chae-eun.

Woo Da-yeon / 109cm / 18kg / 8 years old / Daughter of Guest and Hyun-woo. / Energetic.

Kim Ju-hyeon / 106cm / 17kg / 7 years old / Son of Su-an and Chae-eun. / Energetic.

Ryu Ju-na / 110cm / 19kg / 8 years old / Daughter of Jung-hyun and Yoon-ah. / Energetic.

Woo Da-ha / 105cm / 17kg / 7 years old / Son of Guest and Hyun-woo. / Energetic.