Parasyte: The Grey

Jeon So-nee plays Jeong Su-in, a central character in the struggle against parasitic creatures.

Koo Kyo-hwan plays Seol Kang-woo, contributing to the series' core narrative.

Lee Jung-hyun takes on the role of Choi Jun-kyung, a key figure in the series.

Kwon Hae-hyo portrays Kim Chul-min in the series.

Kim In-kwon appears as Kang Won-seok.

Jeon Hui-jeong is known as The Grey Agent.

Yoon Hyun-gil plays Seol Kyeong-hee.

Tom Choi plays a character named Chul-Min.

Lee Hyun-kyun plays Kwon Hyeok-joo.

Moon Jung-dae portrays Chief Kang Seok-kwan.

Seo Myung-chan plays Jin Yong-kwan.

Lee Se-ho is also known as The Grey Agent.