Sang-hwa

Sang-hwa is a Tetartagonist in Train to Busan.

He is protrayed by Ma Dong-seok.

History
He is a worker married to a pregnant woman, Seong-kyeong who takes the same train as Seok-woo, for Busan. While his wife is in the bathroom, Sang-hwa tells Su-an, Seok-woo's daughter, to go to another car.

Later, because of a stowaway woman, the train passengers begin to be infected and attack people. Sang-hwa briefly fights with one of the infected and locks him in the toilet.

All the passengers gathered in a single car and Seok-woo closed the door on Sang-hwa and his wife. For good reason, Sang-hwa develops an aversion to him and even tried to hit him before being stopped by Seong-kyeong.

The train then stops to Daejeon station and Sang-hwa goes out with his wife. However, they and the other passengers quickly turned around when they saw the infected army.

Sang-hwa is separated from Seong-kyeong and goes on a car with Seok-woo and Yong-guk, a teenager. He is the one who decides how to fight the zombies to join his wife and Seok-woo's daughter. They finally find them and runs to the car where the other passengers are while they're chased by the infected. With Seok-woo, Sang-hwa blocks the door to not make zombies enter, but he shuts it on one of the zombie's head and hands and is bitten on the hand.

He decides to sacrifice himself and tells Seok-woo to take good care of Seong-kyeong and tells Seong-kyeong the baby's name. That's when the door breaks and all the zombies throw themselves on Sang-hwa who begins to be infected. He retains them as best he can before being completely transformed and the others manage to get into the car.