Jay-Hun is a survivor of the Green Roof Apartments. Jayhun is usually seen with Ji-Su. Jay-Hun was a devout Christian, which other apartment residents found odd. However, despite what he believed in, Jay-Hun was very tolerant of other beliefs. Through Jay-Hun's faith, he was able to work up the courage to do things that would otherwise terrify him. He was also very kindhearted towards others, even towards Hyun Cha who is infected. Jay-Hun used a sword as his weapon.