Judge vs. Judge

Lee Seon-hwa, a single mother who is a member of the misjudgment researching team.

Choi Go-soo

Yoo Myung-hee, a professor in law school. She inspired Lee Jung-joo to become a judge.

Choi Kyung-ho, Lee Jung-joo's older brother

Sa Eui-hyeon, a righteous independent judge who is excellent in his use of law and ethics to reach judgement. He is assigned to the same division as Lee Jung-joo.

Jang Soon-bok

Moon Yoo-seon

Hwang Min-ah, a former Blue House bodyguard and current law school student.

Eom Sin-sook, Lee Jung-joo's mother and a janitor at the courthouse.

Jin Se-ra, an intelligent third generation chaebol who is a law school student and a former idol singer.

Lee Jung-joo/Choi Jung-joo, a hot-tempered judge who is incapable of holding her emotions to vent shameless defendants with unspeakable words. She presides at the Seoul District Court.

Do Han-joon, a prosecutor who graduated with Sa Eui-hyeon at the top of his class.