Sae-byeok is very quiet and calm, never panicking even in stressful situations. She is also very reserved and prefers to work by herself. She is reluctant to interact with others and reveal things about herself, hesitating even to say her name to anyone without having a reason to do so. She also rarely lets it show any kind of emotion she is feeling, and is stoic most of the time. Sae-byeok states that she doesn't trust anyone, especially the people in the games, knowing that she can be betrayed by other players at any time.