Geun-sae

Geun-sae is the main antagonist of the 2019 film Parasite. He is the husband of Guk Moon-kwang who hid in a bunker for 4 years before the events of the film.

He is portrayed by Park Myung-hoon.

History
Moon-kwang rings the bell and asks to be let in, claiming that she comes to retrieve something in the basement. As the rest of the family hides, Choong-sook lets Moon-kwang in. In the basement, the former housekeeper opens a secret door to a bunker, where her husband Geun-sae has been hiding for 4 years to avoid the loan sharks.

As Choong-sook threatens to call the police, the rest of the Kims stumbled into view. Moon-kwang quickly captures the Parks' new driver and two tutors addressing each other as father and children. As she threatens to send the clip to the Parks, a fight ensues and the Kims subdues the couple.

The phone rings and they learn that because of heavy rain, the Parks have cancelled the camping trip and will be home soon. The Kims scrambled to confine Moon-kwang and Geun-saw, then clean up and hide, while Choong-sook makes ram-don as requested by Mrs. Park. Moon-kwang breaks free and runs up the basement stair into the kitchen, but Choong-sook kicks her back down, severely wounding her. Later, Moon-kwang dies from her wounds as Geun-sae cries.

The following day, Mrs. Park throws a birthday party for Da-song and invites the Kims to participate. As the party proceeds, Ki-woo carries the lucky rock down to the bunker, intending to use it as a weapon. Geun-sae ambushes Ki-woo and cracks his head open with the rock.

Geun-sae stabs Ki-jeong in the chest. His appearance triggers Da-song's traumatic memory and the kid begins to have a seizure. Ki-taek rushes to stop Ki-jeong's bleeding, but Mr. Park yells at him to throw the car key over so Mr. Park can drive Da-song to the hospital. The thrown key is trapped under the fighting Choong-sook and Geun-sae. Choong-sook kills Geun-sae with a meat skewer.