Krystal is quiet, calm and very stoic. She never really expresses her emotions, making her somewhat of a kuudere character. She's given the nickname "Ice Queen" due to her stoic and cold demeanor and her beautiful appearance. However, she's rather gentle, and helps people in need, despite her stoic and unexpressive nature. Though usually harmless, Krystal can be very aggressive to those who provoked her or her loved ones.