Sung-Sun is very composed, mature, and intelligent, often advising her fellow Fracción, Emilou Apacci and Franceska Mila Rose, to stop arguing, for it makes them look weak, before chiding their angry responses. She has a habit of covering her mouth with one of her long sleeves, and has an incomprehensible look in her eyes when doing so.[6] She has a sort of snobbish attitude toward her fellow teammates, complaining when they get in her way during combat.[7] She easily gets them riled up by taunt