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A dutiful and reckless Catholic priest who is a member of 634 Regia. Twenty years prior to the series, Soo-min and his father, along with priest Moon Ki-seon, witnessed the death of his mother at a young age, where she was possessed and killed by a demon due to his father's refusal to believe in exorcism preventing her from receiving one. Under priest Moon's tutelage, he becomes an exorcist.
A doctor at Southern Catholic Hospital who lost her faith in God at a young age when her parents died in front of her in an accident, she first encountered Soo-min when her most recent patient turns out to be possessed by an evil entity. Witnessing the exorcisms of both the patient and the subsequent possession of a colleague by the same entity caused her to rethink her beliefs.
A senior Catholic priest who founded 634 Regia, a group of priests that performs exorcisms unofficially while still recognized by the Vatican. When he was younger, he was called upon by Soo-min to save his mother but was too late. He was the one who takes Soo-min under his wing and taught him how to conduct exorcisms.
Priest : South Korea viewers per episode (thousands)
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In the table above, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
This drama aired on a cable channel/pay TV which normally has a relatively smaller audience compared to free-to-air TV/public broadcasters (KBS, SBS, MBC and EBS).