Hyun-Su Cha

The main character of the story. An isolated, lonely teenager who is forced to move when his family dies in a traffic accident. He is eighteen years old and stopped going to high school due to unknown reasons. He spends his time trolling and tricking on internet, as well as playing various RPGs. He sold his old house and moved into Green Home apartments (room 1410) because the money left by his deceased family was insufficient for him to survive as an isolated person. He then proceeds to chose October 25th as a date to commit suicide.

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Hyun is a human infected with the monsterization, but fights back against both his impending mutation and the monsters that have overtaken the world.

His weapon of choice is a handmade electric spear, powered by a large battery that he carries in his backpack.

It was revealed in chapters 81 and 82 that

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Hyun had a rather happy childhood. Up until his high school years, he was the pride of his family. However, in high school he was targeted by a rich bully who made sure that Hyun was socially excluded. Eventually, even his own sister started excluding him by claiming that he wasn't her brother. His parents took little action, due to the fact that the bully's father was owner of the company Hyun's dad worked at. They did however talk to the school, and the bully stopped picking on him after that incident. However, Hyun was traumatized from the experience, and came out a different person. Eventually, he fell into suicidal thoughts and developed a history of self harm.