They have done so great at being bad!

1. Hyun Soo Ah (My I.D. is Gangnam Beauty)

Soo Ah is on the top list. Soo Ah, Mi Rae, and Kyung Seok are classmates. She is the university goddess or the most popular girl in boys. She is innocent, friendly, beautiful, and kind. She is the ideal type of campus male students. To see her cooking schemes to bring trouble to other people may seem surprising. She doesn't care about all the men who like her. All she wants to do is ruin relationships and damage Mi Rae's reputation. Viewers thought Soo Ah's motivation is pure jealousy, but her heart has definitely more than that. She was a victim of a bully because of her physical appearance when she was a child. This led her to acquire skewed up values about attention and love. She is an effective villain because you can easily meet someone like her in real life.

2. Princess Yeon Hwa/Queen Daemok (Moon Lovers: Scarlet Heart Ryeo)

Princess Yeon Hwa is not the main villain but she shined brightly doing her schemes in this epic Korean adaptation of a Chinese novel. There is something deeper and darker in her motivations rather than being the run-of-the-mill conceited royal who shows off her position around. She doesn't feel guilty framing other people just to get what she wants. .Yeon Hwa is not doing all of this just to be evil. She wants to protect her family from having the short end of the stick. She is a role model of how women can fight in a society that used dominated by men. She didn't use her strength to win battles and draw swords but she can sacrifice everything including her heart's desires.

3. Coach Kim Yeo Jeong (SKY Castle)

SKY Castle became a successful drama in Korea. The moral lesson of the story is the bad result of being obsessed with status and ambition. The characters are willing to risk anything to keep face. Academic coach Kim Yeo Jeong is the ruthless villain who makes decisions that compromised the lives of many people. Viewers believed that Coach Kim is the most dynamic among the whole cast. She had a dark past that greatly impacts the whole story. Some said that she is a scapegoat because she made the other characters realize the consequences of their decisions.