MAIN STAR:

Jung, Jessica as Athena Valeen Mercado Aragon

Jung Jessica as Ava Espinosa

SUPPORTING STARS:

Choi Siwon as Jose Enrique Rodrigo Madrigal III

Lee Dong Hae as Christian Troy Arceo Melendez

Kim Heechul as Sebastian Klark "Sky" Madrigal Yu

Kim Kyuhyun as Nomer Elmo "Noel" Angeles

Choi Sooyoung as Vivian Hilary Quizon Trinidad

Seo Ju Hyun as Trina Courtney Mari Roswell Dizon

Tiffany Young as Angelica Mariam Lorena Gonzales Estrada

Kim Hyoyeon as Zoe Rafaella Rosell

Park Sun-Young (F(x) Luna) as Asianna Clarisse Mercado

Song Qian (F(x) Victoria) as Maria Stella "Stella" Del Prado