Seo Yoon is a charismatic commander of her squad, using her charms and leadership skills to lead the battle. She is also highly intelligent, manipulative and cunning— traits she believed were necessary to survive as a mercenary on the Dark Network. She has deceived people, including her own allies, to reach her objectives. While she would never truly betray her friends and comrades, Yoon doesn't show much remorse for tricking them so as long as her mission runs as planned.