Lee Su-Hyeok

Despite being the attractive class president and top student at Hyosan High School, Nam-ra was an emotionally withdrawn outcast, rejected by her peers, who perceived her introversion as elitism and arrogance. She often isolated herself and devoted herself to her studies. In reality, she was a solitary girl forced to keep her distance from others due to her wealthy and domineering mother's influence in every aspect of her life. This led to students stigmatizing her as a princess raised for success, for example, when her mother donated a large sum of money to the school so her daughter could become class president.

The zombie outbreak finally brought Nam-ra out of her shell; spending time and communicating with her classmates created the first emotional bonds of her life, such as her subtle romance with Lee Su-hyeok. Becoming infected with the zombie virus and mutating into a zombie-human hybrid would test these bonds to their limits; her enhanced abilities grew alongside her desire to protect her new friends, but so did the horrific, monstrous inner urges that drove her to devour them all.

Skills/Abilities
Greater resistance:
Heightened hearing/smell
Improved agility
Immortality/Regeneration
Immunity to zombies
Bloodlust
Weakness:
Loud noises (thunderstorms, rain)
It is not feeding
Fire/Explosives/Gunshots
Portraits

Familiar
Nameless Mother
Romantic (unconfirmed)
Lee Su-hyeok
Hyosan School Group

Nam-ra's mother donated a large sum of money to the school, and the principal appointed her class president. However, no one took her position seriously, as some students made fun of her. Nam-ra was aware that her classmates didn't consider her the president and usually kept to herself, studying. At one point, her classmate Lee Su-hyeok spoke to her and mentioned that she was the class president when he suggested they visit Kim Hyeon-ju in the hospital. Nam-ra replied that since no one in the class considered her the president, she didn't bother taking the title seriously.

When the outbreak began, Nam-ra was walking along, reading a book. Because she was wearing headphones and listening to music, she didn't notice the panic around her until Su-hyeok ran toward her and grabbed her. The two fled from the approaching zombies as she watched them. While escaping through the school, they used a ladder to climb to a second-floor window, where Nam On-jo and other surviving students were hiding in their classroom. The survivors saw them and helped them get inside.

Shortly after, Professor Kang Jin-gu entered the room after Han Gyeong-su left, having been arguing with Lee Na-yeon. After being bitten, he transformed into a zombie and infected Kim Min-ji. Nam-ra and the others fled through the hallways and managed to reach the science lab on the top floor. There, they barricaded the doors, but noticed that Su-hyeok had become separated from the group. Later, they spotted him hiding in the art room. Soon after hiding in the lab, the group realized their barricade wouldn't hold, so they used a fire hose to get down to the broadcast room, where their English teacher, Park Sun-hwa, was hiding. Before leaving, Nam-ra left a note for Su-hyeok in case he went to the lab and kept the door closed while the others prepared the hose. Su-hyeok eventually reached the broadcast room by using the windows to navigate to their location. However, he did not see the note, as he was in another room.

That night, Nam-ra witnessed and reported Lee Na-yeon for infecting Han Gyeong-su. When she saw Na-yeon holding Gyeong-su's hand and wiping it with a handkerchief, she showed an expression of disappointment on her face.
Later, after Kim Ji-min accidentally activated the intercom, Nam-ra came up with the idea to use it to distract the zombies and run to the music room, where they had found Lee Cheong-san hiding while using a drone. The group used the intercom to guide the zombies to the left side of the school and ran toward the music room. Su-hyeok stayed behind to defend them from a zombie that hadn't responded to the sound and was accidentally alerted to their location. On the stairs, he was attacked by the zombie and nearly bitten; however, Yoon Gwi-nam killed it, then attacked him when he refused to reveal Cheong-san's location. Nam-ra noticed he was missing and went back for him, where she saw him being attacked by Yoon Gwi-nam. She tried to pull Gwi-nam away from Su-hyeok, but the thug attacked her and bit her on the arm. Su-hyeok, enraged at seeing Nam-ra injured, pushed Gwi-nam out of a nearby window, and they both ran together towards the music room, managing to get inside safely.

While the group was in the music room, Seo Hyo-ryung noticed the wound on Nam-ra's arm and alerted the group. Su-hyeok said that Gwi-nam had bitten her, but Lee Cheong-san claimed to have seen Gwi-nam being bitten by zombies, causing the group, including Nam-ra herself, to fear that she too would become a zombie. Some students wanted Nam-ra to leave the room, but Su-hyeok refused and quickly tied himself to her so that, if she transformed, she would only attack him. Later, Nam-ra showed symptoms of becoming a zombie, such as the urge to bite Su-hyeok and heightened hearing. She managed to resist the initial urge; however, she knew what she had almost done and was upset about it, wanting to leave the room. Afterward, Su-hyeok confessed that he liked her, and she confessed that she liked him too before they kissed. Yang Dae-su coined the term "halfbie" (half human), referring to the fact that Nam-ra was infected but still retained the intelligence of a human being.
The group eventually ran to the rooftop, but Gwi-nam attacked them on the stairs as they tried to open the door. Nam-ra used her virus-enhanced strength to defend the group from Gwi-nam, throwing him down the stairs. Later, as the group settled on the rooftop, Nam-ra expressed her hope that one day, when the outbreak was over, they could sit together around a campfire as they were doing now, calling the group her friends. During the night, Gwi-nam confronted the group again after scaling the school walls. The students began fighting him, while Nam-ra's infection worsened. Still standing, she joined the fight and faced Gwi-nam. Upon noticing that Nam-ra was also mixed-race, the aggressor tried to convince her to join him, but she refused and pushed him away. Su-hyeok fought back, but Gwi-nam overpowered him and pinned him to the edge of the balcony. Then Nam-ra fought and threw him off the rooftop after a brief struggle.
During the thunderstorm, Nam-ra was the only girl who didn't cry after the rescue team left the group, due to her sensitivity to loud noises. Su-hyeok looked after her while she dealt with the noise. When both groups met and entered the gymnasium, she froze in fear, and when Oh Joon-yeong asked her what was wrong, all she could say was "run." Suddenly, lightning struck, revealing the groups' locations and the large number of zombies inside the gymnasium. She was probably the only girl who noticed that Ji-min wasn't with Hyo-ryung after safely entering the warehouse with the group. The next day, for the first time, she appointed herself "class president" and used that title to vote on how to resolve a fight between Joon-yeong and Park Mi-jin. She also held Hyo-ryung's hand to comfort her when she was scared before they left the warehouse.

Later in the play, she alerted the group after sensing the presence of zombies and found a ledge on the second floor from which they could escape. Sitting on the ledge, she exhibited symptoms of cardiac arrest (including clutching her heart) and felt the urge to bite Su-hyeok again before controlling it by biting herself, putting herself at risk. Afterward, she heard the army's evacuation warnings and alerted the group about the impending bombing of Hyosan High School.

After the school was bombed, Nam-ra returned with On-jo to the ruins of the construction site, hoping to find Cheong-san. After stating that she saw no signs of life, Nam-ra comforted On-jo when she accepted Cheong-san's (still unconfirmed) death, hugging her and weeping with her. Later, as the group made their way through the forest, she suspected that the main reason the military had called off the rescue and bombed the school, despite knowing there were survivors, was because she was of mixed race and they assumed the entire group was.

After the group reached a nearby infected village, she sensed the presence of zombies and urged them to run, but they stopped because Dae-su, Su-hyeok, and Wu-jin had fallen behind. Dae-su's injured leg was causing him to equip weapons in preparation for an attack. The horde emerged from the fog, and a fight ensued, during which Nam-ra killed several zombies. When Jang Wu-jin transformed after being bitten by a zombie, Nam-ra snapped his neck in front of everyone. Jang Ha-ri tried to attack Nam-ra with a shovel, but Nam-ra threw it away. Park Mi-jin then scolded Nam-ra for not apologizing to Ha-ri after killing her brother in front of her. When Nam-ra saw Ha-ri crying, her urge to devour the group suddenly returned, and she turned away, trying to control it.

Nam On-jo - Best friend, former enemy, love rival
Lee Cheong-san - Friend
Seo Hyo-ryung - Friend
Yang Dae-su - Friend
Han Gyeong-su † - Friend
Kim Ji-min † - Friend
Oh Joon-yeong † - Friend
Jang Wu-jin † - Friend, victim
Park Sun-hwa - Friend
Yoon I-sak † - Classmate
Kim Min-ji † - Classmate
Jang Ha-ri Group
Jang Ha-ri - Friend
Park Mi-jin - Friend
Hyosan
Nam So-ju † - Savior
Others
Hyosan School Group
Lee Na-yeon † - Enemy
Class 2-5
Park Hee-su † - Classmate
Yang Yeong-ju † - Classmate
Hyosan Institute
Yoon Gwi-nam - Enemy
Kim Hyeon-ju † - Classmate
Kang Jin-gu † – Enemy
Military
Squadron Captain - Attempted Savior

Su-hyeok is a popular student at Hyosan High School, a former bully who has mended his ways and was Nam On-jo's platonic love, which put him in an involuntary love triangle with her best friend, Lee Cheong-san.

Su-hyeok used to hang out with the bullies before realizing they weren't good people. Since then, he's been spending time with his classmates to get to know them. Before the outbreak, he seemed to have a good reputation with his classmates, and he was even in love with Nam-ra despite On-jo's attempts to flirt with him. Before the outbreak, he noticed the bullies taking Eun-ji and Cheol-soo to the construction site and went after them in an attempt to help the couple, but Eun-ji decided to stay behind for fear that the bullies would send nude photos to her mother while Cheol-soo stayed to look after her. Later, he took Kim Hyeon-ju to the nurse's office. Not long after, On-jo invited him to hang out with her during lunch, but he lied, saying he'd be playing basketball. In reality, he looked for Nam-ra during recess and had a short conversation with her before she continued walking and studying.

They're all in a zombie apocalypse, he's Korean, he's 17