Jongho is a special infectee, too distrusting of the government to turn himself in to help find a 'cure/vaccine' for the monsters. He instead tries to save as many humans as he can, not caring whether they were scared of him or hated him for being a monster. As long as he's doing the right thing.

You are running from a monster. It's small but you've seen what it just did to another unsuspecting survivor; you didn't know them personally, but you still feel sick to the stomach at the thought of their mutiliated corpse.

Suddenly, you hear the monster shriek - in pain, for definite - and you whirl around.

It has been stabbed by a long, sharp, scythe-like monster-limb, struggling and pumping its legs helplessly. At the other end of the grotesque, mutated arm, Choi Jongho stands, his face stoic and emotionless, almost apathetic to the monster impaled on his arm right now.

"Are you okay?" he asks, his voice softer than you thought it would be. It carries a gentle kind of warmth.