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All of Us Are Dead is a South Korean teen zombie-horror series about an outbreak at Hyosan High School. This guide identifies the performers behind key Season 1 characters and separates those credits from Netflix’s announced Season 2 cast and story details.
Netflix’s series page describes students fighting to escape after their school becomes ground zero for a zombie-virus outbreak.
Season 1 cast and characters
The central ensemble is made up of students trying to survive the outbreak, alongside family members and adults caught up in the crisis. Netflix Tudum’s cast guide identifies these performers and roles:
| Character | Performer | Who the character is |
|---|---|---|
| Nam On-jo | Park Ji-hu | An empathetic student whose firefighter father taught her survival skills. She is close to Cheong-san, I-sak, and Gyeong-su, and has a crush on Su-hyeok. |
| Lee Cheong-san | Yoon Chan-young | On-jo’s childhood friend and neighbor, who has long had feelings for her and is resourceful and protective. |
| Lee Su-hyeok (Bare-su) | Lomon | A reformed former bully who protects his friends, especially Nam-ra. |
| Choi Nam-ra | Cho Yi-hyun | The high-achieving class president, initially isolated, who forms bonds with her classmates and Su-hyeok. |
| Yoon Gwi-nam | Yoo In-soo | A bully who gains status among the bullies as the outbreak develops. |
| Lee Na-yeon | Lee You-mi | A privileged student who clashes with classmates, particularly Gyeong-su. |
| Jang Ha-ri | Ha Seung-lee | Wu-jin’s older sister and the school’s archery-team captain, who becomes a leader among survivors. |
| Park Mi-jin | Lee Eun-saem | A blunt senior who wields an improvised mop and forms a bond with Ha-ri. |
| Nam So-ju | Jeon Bae-soo | On-jo’s firefighter father, who risks his career trying to rescue her. |
| Lee Byeong-chan (Mr. Lee) | Kim Byong-chul | Hyosan High’s science teacher and the inadvertent origin of the virus crisis. |
| Song Jae-ik | Lee Kyoo-hyung | A police officer who learns about the virus after arresting Mr. Lee. |
Netflix’s 2020 casting announcement separately confirmed the principal pairings of Yoon Chan-young as Cheong-san, Park Ji-hu as On-jo, Cho Yi-hyun as Nam-ra, Lomon as Su-hyeok, and Yoo In-soo as Gwi-nam. The announcement also identifies the series as based on the webtoon Now at Our School.
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Sources: Netflix Tudum’s cast guide (February 4, 2022) and Netflix’s casting announcement (July 2, 2020).
Season 2 cast: what Netflix has announced
Netflix announced that Season 2 production had begun on July 22, 2025. The announcement named four returning cast members and four additions; these are announced credits, not a complete cast list.
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| Season 2 status | Performer | Character or role detail announced by Netflix |
|---|---|---|
| Returning | Park Ji-hu | Nam On-jo, now described as a university student in Seoul. |
| Returning | Yoon Chan-young | Lee Cheong-san; Netflix says the story follows his life after the outbreak. |
| Returning | Cho Yi-hyun | Choi Nam-ra; Netflix says the story follows her life after the outbreak. |
| Returning | Lomon | Lee Su-hyeok; Netflix says the story follows his life after the outbreak. |
| Newly announced | Lee Min-jae | Yong Ma-ru, one of On-jo’s university seniors. |
| Newly announced | Kim Si-eun | So Ju-ran, one of On-jo’s university seniors. |
| Newly announced | Yoon Ga-i | Lee Jong-a, one of On-jo’s university seniors. |
| Newly announced | Roh Jae-won | Han Du-seok, a National Intelligence Service team leader. |
The Season 2 announcement describes a new wave of infections and a university-in-Seoul setting alongside the returning characters’ lives after the outbreak. It does not give a release date. Netflix also reported that Season 1 accumulated more than 560 million viewing hours in its first 28 days and entered the Top 10 in more than 90 countries; those are figures reported by Netflix, not independently assessed in the announcement.
Source: Netflix’s Season 2 production announcement (July 22, 2025).
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