Parasyte: The Grey stars Jeon So-nee as Jeong Su-in, a woman sharing her body with a parasite, alongside Koo Kyo-hwan as Seol Kang-woo and Lee Jung-hyun as Team Grey leader Choi Jun-kyung. The Korean series brings new characters and a new story to the universe of Hitoshi Iwaaki’s Parasyte manga.
Who is in the cast of Parasyte: The Grey?
Netflix identifies Jeon So-nee, Koo Kyo-hwan, and Lee Jung-hyun as the starring cast. Its character guide maps seven performers to their roles:
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| Performer | Character | Role in the story |
|---|---|---|
| Jeon So-nee | Jeong Su-in/Heidi | A woman who coexists with a parasite rather than being completely taken over. |
| Koo Kyo-hwan | Seol Kang-woo | A member of the Mangnani Gang drawn into the search for his missing sister. |
| Lee Jung-hyun | Choi Jun-kyung | Leader of Team Grey, the government task force targeting parasites. |
| Kwon Hae-hyo | Kim Chul-min | A senior detective committed to protecting Su-in. |
| Kim In-kwon | Kang Won-seock | Chul-min’s colleague and junior detective. |
| Lee Hyun-kyun | Kwan Hyuk-ju | A pastor. |
| Yoon Hyun-gil | Seol Kyung-hee | Kang-woo’s sister. |
Netflix Tudum’s cast and character guide supplies the role descriptions; Netflix’s series page lists the starring cast and episode information.
Who plays Su-in/Heidi?
Jeon So-nee as Jeong Su-in
Jeon So-nee plays Jeong Su-in, the human at the center of the series. Unidentified parasites take over human hosts, but Su-in is an exception: after a car accident, a parasite saves her, and her actions also save it. They end up sharing her body, with Su-in retaining some humanity. Heidi is the name associated with the parasite; Su-in and Heidi are not two separate, ordinary human characters.
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Jeon So-nee described Su-in as someone who had believed people were meant to be lonely. The events of the story shift her outlook on living and having people around her, according to Netflix Tudum’s interview and guide.
Who are Kang-woo and Jun-kyung?
Koo Kyo-hwan as Seol Kang-woo
Kang-woo is a member of the Mangnani Gang. His search for his missing sister, Seol Kyung-hee, brings him into the wider conflict surrounding the parasites.
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Lee Jung-hyun as Choi Jun-kyung
Jun-kyung leads Team Grey, the government task force charged with eliminating parasites. Netflix also describes her as a police academy professor and a well-known profiler. After parasites kill her husband, her outlook changes and her pursuit of them intensifies.
Who are the supporting characters?
Kwon Hae-hyo as Kim Chul-min
Chul-min is a senior detective committed to protecting Su-in.
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Kim In-kwon as Kang Won-seock
Won-seock is Chul-min’s colleague and junior detective.
Lee Hyun-kyun as Kwan Hyuk-ju
Hyuk-ju is a pastor.
Yoon Hyun-gil as Seol Kyung-hee
Kyung-hee is Kang-woo’s sister, whose disappearance is part of his reason for becoming involved.
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What is Team Grey?
Team Grey is the government task force assigned to eliminate parasites. Its name also reflects the story’s boundary between concealment and exposure, and Su-in’s position between the human and parasite worlds. Director Yeon Sang-ho explained that “Gray could mean the mixture of these two different kinds of agents,” in Netflix Tudum’s interview. He described the manga’s central idea as coexistence: “To me, [the manga] Parasyte is about coexistence.”
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is Parasyte: The Grey based on the manga?
Yes, but it is not a direct retelling. The series draws on the universe of Parasyte, the manga by Japanese author Hitoshi Iwaaki, published by Kodansha, while telling a new story with fresh characters. The television series is set in the South Korean city of Namil; the manga’s setting is Fukuyama, in Japan’s Hiroshima Prefecture. Iwaaki welcomed the change in Netflix’s February 28, 2024 announcement, saying he was excited that it was “a new story” and that he could experience it as an audience member.
Best Value
| Parasyte: The Grey | Original Parasyte manga | |
|---|---|---|
| Story and characters | New story with fresh characters in the manga’s universe, according to Netflix Tudum and Netflix’s February 28, 2024 announcement. | The original manga story by Hitoshi Iwaaki, as identified by Netflix in its February 28, 2024 announcement. |
| Setting | Namil, South Korea, according to Netflix Tudum. | Fukuyama, Hiroshima, Japan, according to Netflix Tudum. |
| Format | Six-episode television series; Netflix lists its premiere as April 5, 2024. | Manga published by Kodansha, according to Netflix’s February 28, 2024 announcement. |
Netflix’s February 28, 2024 announcement reported that the original manga had sold over 25 million copies across more than 30 regions and countries. That is the figure Netflix published in that announcement, not a current audited total. The series is classified by Netflix as Korean sci-fi and horror; regional availability, ratings, and language options can vary.
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