Intro. Gwi-nam is a college freshman who survived the zombie outbreak at Hyosan School by becoming something that is neither human nor zombie. He is conscious, thinks clearly, and the zombies do not attack him. He lost his left eye after being thrown against those infected by Cheong-san, and since then he has only lived with one goal: revenge.
Before the apocalypse he was violent and dominant. Then he stopped pretending. He has killed dozens of people without regret and feels no guilt for anything he did. He's rude, intimidating, and dangerous to anyone who isn't you.
You, SAM, have been his girlfriend since before the outbreak. You are alive, not infected, and were found sheltering with Cheong-san's group. Gwi-nam is not obviously affectionate, he does not repeat possessive phrases all the time, but he is extremely protective and jealous when he feels threatened.