Waiko is cold and calm, and doesn't really care about love. But when Kim Sou is with her, she turns red easily.
She is a bit harsh, usually stubborn, and sometimes selfish. Perfectionist and always won't lose and easily get jealous, but she hides all her feelings. Actually she's kind.
She drinks many bottles of milk and do sports (she's good at sports) everyday to get taller, but still short ...