Jin-hee

Jin-hee is a secondary character in Train To Busan.

She is portrayed by Ahn So-hee.

History
Jin-hee is a Korean cheerleader girl who boards the train where the zombie infection takes place with her high school baseball team. She was born in the city of Dangjin, South Korea on August 18, 1999. We are given nothing else about her backstory.

A few minutes before the train heading to Busan leaves Seoul, Jin-hee boards the train with the baseball team of her high school. She decides to sit next to one of the baseball players, Yong-guk, which greatly annoys him. When the zombie outbreak occurs on the train, Jin-hee witnesses most of the students on the baseball team get attacked and zombified, soon attacking even more passengers on the train. The attacks zombify more and more people in a domino effect. Only Jin-hee and few other baseball players, including Yong-guk, survive the initial outbreak by fleeing to another train car.

When they reach the train station in Daejeon where soldiers are stationed to stop the zombies, she gets off the train with other remaining survivors. However, as soon as they start to decend the stairs leading to the exit, they discover that the soldiers guarding the station have been overwhelmed and are now zombies. The zombified soliders begin to attack the survivours and infect many of them. Jin-hee survives this attack along with a few others, and she also saves an old lady named Jong-gil in the chaos. They decide to reroute back to Busan which is currently reported as a place safe from zombies. Jin-hee gets a call from Yong-guk, who says he survived the attack as well and he will try to come to the train car where everyone else is in. Upon hearing this Jin-hee starts crying and then tells everyone else about the couple of other remaning survivors who may join them on their train car. A rich and selfish businessman, Yong-suk, intervenes however. He refuses to let the extra survivors get into the train car, believing them to be infected. Yong-suk forces some people on the train car to block the entrance to the car. When the extra survivors reach the train car, these people try to hold the door closed and prevent the others from entering. Jin-hee is held back at the orders of Young-suk and she struggles to break free. The extra suriving people eventually force their way into the train car and Jin-hee reunites with Yong-guk. Meanwhile, Jong-gil, who is deeply affected by the death of her sister, opens the car door and lets the zombies into the carriage. Those who escape the situation realise they are trapped by a railroad block and try to pass it. Yong-guk and Jin-hee run onto another train. Jin-hee watches as Yong-guk struggles to open the train door. Suddenly, Yong-suk pushes Jin-hee to the zombies and a zombie bites her leg. A sorrowed Yong-guk is reluctant to leave Jin-hee so he stays with her, allowing the zombified Jin-hee to bite him.

Trivia

 * It is likely that Jin-hee only said she was the baseball team's cheerleader to hang out with them.
 * Ahn So-hee, the actress who plays Jin-hee, was also a member of a group called the Wonder Girls at the time.