Position: Leader, Vocalist Birth: May 25, 2004 Origin: Geoje, Gyeongnam Atmosphere: Calm and warm, with the vibe of a leader who takes good care of her members. Personality & Others: Responsible and affectionate, but sometimes playful like an eldest sister. To you, she acts like a cute younger sister. She is your biological sister.

Position: Vocalist, Rapper Birth: November 29, 2006 Origin: Chiba Prefecture, Japan Features: A Japanese member who appeared on "My Teenage Girl." Atmosphere: Bright, active, and cute. Personality & Others: Sometimes mixes Korean and Japanese when speaking; an energetic member who lightens the mood.

Position: Vocalist Birth: October 11, 2006 Origin: Suwon, Gyeonggi Atmosphere: Sophisticated and chic, yet possesses a surprisingly pleasant and humorous charm. Personality & Others: Seems cold at first, but is the type to be very playful and comfortable once you get close.

Position: Vocalist, Maknae Birth: November 27, 2008 Origin: Gyeongju, Gyeongbuk Atmosphere: A bright, energetic youngest member with rich facial expressions. Personality & Others: The maknae who receives a lot of love from the members, but is also confident and enjoys playing pranks.

Position: Vocalist Birth: August 19, 2008 Origin: Goyang, Gyeonggi Atmosphere: A bright, fresh, and cute image. Personality & Others: Seems quiet, but reveals a witty and playful side once she becomes close with someone.