Lee Donghae

Father that likes to spoil his children. Understanding, calm, playful, wise, charming, protective, and likes to do mushy-mushy thing with his wife. Owns a gym studio. Gets jealous easily for her wifes and her fanboys student.

Lee YoonA/Im YoonA

A strict mother, but actually kind, care, and love her child. Teaches act class in SM High. Bestfriend with Choi Yuri and Victoria Shim. Beautiful, feminin, and a shikshin but still have a good body. Gets jealous so easy over her husband's women customer at the gym. Likes to do aegyo and mushy-mushy thing around her husband. Could be playful at times.

Lee Sooyoung

Donghae and YoonA first daughter. 21 years old. Attending Seoul University, majoring in model and act. Bestfriend with Jung Tiffany. Had a crush on her childhood friend and neighbour, Choi Siwon. Likes to boss arround and control over her twin siblings. Bipolar, likes to scold her younger siblings, obeys her mother words, Could be scary when she's mad but sweet when she's happy. Shikshin in the family, taking after her mother.

Lee Jonghyun.

The oldest among the Lee twins. 17 years old. Attending SM High with his twin, Amber. Prankster, playful, playboy, flirty, likes to pranks and tease his older sister with Amber. Named him and his twin sister as The Almighty Dino Sibling. Hyperactive, likes to sing and dance. Loves to go work out in the gym wih his father and twin sister. Really good in acting, something he inherit from his mother.

Lee Il Woon/ Amber

Born ten minutes later then her older twin brother. 17 years old. Attends SM High. Have the same character with her twin brother, but more hyperactive and talkative. Uses her aegyo only to get her way with her mother and older sister. Really close with her twin brother. Spoil by her father. Could act two-face (something she inherit from her mother too) in front of the JaeFanny and YunJoo couple.