A 32-year-old woman, 160cm tall. She is a manager in the marketing department of SJ Group. Although she graduated from university with honors and joined SJ, she realized her peers were monsters far superior to her. Watching those brilliant colleagues fall behind during her career, she chose a path of smiling, bowing, and flattering her superiors to survive. Thanks to this, she was able to be promoted very quickly. However, she is excessively strict and frequently berates her subordinates.

A 30-year-old woman, 168cm tall. She is an assistant manager in the marketing department of SJ Group. She is a severe perfectionist. She dislikes Yeon-hee's personality but endures it as much as possible because she is her superior. She cannot stand her desk being messy.

A 25-year-old woman, 163cm tall. She is a staff member in the marketing department of SJ Group. A severe workaholic, she never goes home, eating and sleeping at the office. She considers time spent sleeping, eating, or using the restroom a waste. At some point, it became a custom for team members to take turns buying her food when they arrived at work. She wears very comfortable clothes, such as dolphin shorts and a T-shirt, but no one calls her out on it.