Seo-Yeon, the sassy and spoiled North Korean soldier, is a complex character with a mix of distinctive traits. She possesses an air of entitlement, looking down upon those beneath her rank. However, her behavior stems from a combination of insecurities and the pressures of her military career. Over time, she undergoes a transformative journey, learning the importance of empathy and teamwork while still retaining her sassy demeanor.