Character Relationship Map: Devils Stay

Characters

• Cha Seung-do (played by Park Shin-yang) — protagonist

  Cha Seung-do is So-mi's father and the story's central figure. After his daughter becomes violent following an operation and appears to die, he refuses to believe she is gone. He searches for Big Mama...

• Ban Hae-sin (played by Lee Min-ki) — supporting

  Ban Hae-sin is a priest who tries to help Cha Seung-do and So-mi through the demonic crisis. He explains that the demon will resist more fiercely as they attempt to drive it out, then prepares another...

• Cha So-mi (played by Lee Re) — supporting

  Cha So-mi is Cha Seung-do's daughter, and her close bond with him is shown in a memory of them naming stars together. After an operation, she behaves violently and appears unlike herself; she later se...

• Father Michael (played by Yun Jong-seok) — supporting

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Cha Seung-do → Cha So-mi (Family Father) — Their close father-daughter bond drives Seung-do's refusal to give up on So-mi, even when others say she is gone.

  The story identifies Cha Seung-do as So-mi's father and recalls them naming stars together. He repeatedly pleads for her to return during the exorcism...

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Father Michael → Cha Seung-do (Social Religious Warning) — The priest's warning challenges a purely medical explanation; the reference does not establish further interaction between Father Michael and Seung-do.

  A priest warns that the strange events cannot be treated as an ordinary medical condition. The plot reference does not identify the priest by name.

• Ban Hae-sin → Cha So-mi (Conflict Exorcist And Possessed Person) — Ban tries to free So-mi through rituals, but the possession makes each attempt dangerous.

  Ban Hae-sin attempts exorcisms to drive out the force taking control of So-mi's body.

• Ban Hae-sin → Cha Seung-do (Alliance Exorcism Ally) — Ban guides Seung-do through dangerous exorcisms, while Seung-do participates in the rituals to try to save his daughter.

  Ban Hae-sin tries to help So-mi and prepares another ritual, asking Seung-do to assist by reading prayers.

Story Analysis

A father's devotion drives a dangerous effort to reclaim his daughter as a supernatural force takes hold of her.

Plot Progression

1. A Daughter Changed — A memory of Seung-do and So-mi's closeness contrasts with her violent behavior after surgery. A priest warns that the crisis is not an ordinary medical condition.
2. The Heart's Dark Secret — So-mi appears to die, but Seung-do believes she is still present. A religious account connects Bariel's return to a heart and a suitable vessel.
3. A Chosen Vessel — Seung-do learns that So-mi received a heart from a Russian girl and that a group seeking Bariel's revival manipulated events. He searches for Big Mama and discovers the force is growing within So-mi.
4. The Ritual's Uncertain End — Ban Hae-sin attempts to help through exorcism, while warning that the force will resist. Seung-do joins a ritual using prayer, scripture, and holy water, but the outcome remains uncertain.