The Guest — Characters & Cast

Tracking down Park Il-do to avenge his mother and grandmother, later shifting toward saving Yoon and Kil-young at the cost of his own life.

Begins as an obsessive, reckless loner haunted by guilt and visions of murders. Over the series, he evolves from a man driven by blind vengeance into a selfless protector who embraces his spiritual sensitivity to shield his friends from destruction.

Cleansing demonic evil and finding the truth behind his older brother’s murder-suicide.

Starts as an emotionally closed-off, rule-bound priest suffering from physical and spiritual exhaustion caused by demonic backlash. Through his friendship with Hwa-pyung and Kil-young, he breaks free of rigid ecclesiastical dogma and learns the value of emotional vulnerability and human connection.

Solving violent crimes and honoring the legacy of her detective mother.

Initially dismissive of the occult, relying strictly on physical evidence and forensic law enforcement. As she confronts undeniably supernatural atrocities, she adapts without losing her fierce commitment to justice and human life, serving as the psychological glue holding Hwa-pyung and Yoon together.

Protecting Hwa-pyung from spiritual annihilation.

Operates as Hwa-pyung’s surrogate older brother and spiritual advisor. Despite his cowardice and constant complaints, his love for Hwa-pyung drives him to perform lethal spiritual investigations that ultimately seal his tragic fate.

Surrendering to the inevitability of human depravity.

A veteran priest regarded as a pillar of the Catholic diocese who harbored profound spiritual disillusionment. He willingly aligned himself with Park Il-do’s malicious influence, serving as a chilling red herring and a testament to the frailty of religious faith when severed from compassion.