Yoon Gwi Nam

Yoo In-soo (born March 25, 1998) is a South Korean actor. He gained recognition for his roles in the Netflix original All of Us Are Dead and the historical fiction fantasy period drama Alchemy of Souls.

Yoon Gwi-nam is the main antagonist of the first season of the 2022 South Korean TV series All of Us Are Dead. He is also the archenemy of Nam On-jo and Lee Cheong-san.

He was played by Yoo In-soo.

Yoon Gwi-nam was a notorious, traitorous, and abusive bully at Hyosan High who used to pick on insecure high school students. When the "Jonas Virus" infection hit the school, he went to the principal's office. Later, the principal and Gwi-nam get into a heated argument that ends with Gwi-nam killing the principal. Lee Cheong-san, who saw the whole thing, threatens to tell the authorities about it, resulting in a fight between the two. While the two are fighting in the library, Cheong-san gains the upper hand by gouging out Gwi-Nam's eye and throwing it to a squad of zombies. Gwi-nam somehow survived the attack and became a "half-bi", gaining advanced strength and other assorted enhancements.

His greatest enemy is Lee Cheong-san, whom he decided to take revenge on after he was caught killing the director.

He is a half-zombie. In his past life, he was a bully who bullied people. However, in a fight with the protagonist in the library, Cheong-san stuck his cell phone in his eye, leaving him blind in one eye. After that, he threw it to the zombies. So Gwi-Nam became a half-zombie. Sometimes, when he wants to kill someone, he just asks "Are you hungry?" And if the person says yes, he says he is too and devours the person. He killed Na-Yeon in one episode.