- Birthname : Lee Sun Kyu
- Name Meaning : Instubborn Jade
- Nickname in SNSD : Energy Pill
- Other Nicknames : Lee Sunny, Lee Sun,
Dolphin, Dolphin Sunny, Cute Sunny,
Sun Kyu
- Birthday : May 15, 1989
- Blood Type : B
- Height : 158 cm
- Weight : 43 kg
- Position : Supporting Vocalist
- Favourite Numbers : 26
- Hobbies : Swimming, Video Games,Sports
- Speciality : Athletics
- Years of Training : 9 months
- Favourite Song from Girls Generation : Ooh La-La!
- Discovery: 2007 SM Casting System
- School(s): Baehwa All-Girls High School
