Taeyeon - a very unique girl, smart

Leeteuk - a very naughty, noisy, smart boy, he hates flirty girls

Jessica - Taeyeon's bestfriend since nursery

Sooyoung - Taeyeon's mother, a very kind woman, she treats Jessica (Taengoo's bestfriend) as her daughter 'coz she is Taengoo's bestfriend

Siwon - Taeyeon's father, she really loves her daughter Taengoo, he's a seaman so he rarely sees his family

Sunny - Jessica's mother

Sungmin - Jessica's father