Nume de nastere: Kim Hyo-yeon (김효연)
Nume: Hyoraengi (tiger), Hyo-choding, Princess Fiona, Dancing Queen
Data nasteri: 22 Septemberie 1989
Inaltime: 160 cm.
Greutate: 45 kg.
Grupa sanguina: AB
Pozitie: Supporting Vocalist/Main Dancer
Limbi:Korean (Fluent), English , Chinese (Fluent), Japanese (Basic)
Specialitate: Dance
Casting: 2000 SM Casting System
Antrenament: 6 Years 1 Month
Scoala: China Beijing Language Courses (중국북경어학연수)