Đỗ Hòa Hiệp

"Đỗ Hòa Hiệp serves for the Viet Cong before he was captured by the Republic of Vietnam Military Forces to be sent into Ducanger Prison V. And how about his comrades? Well, they were captured too. Not to mention, we could rescue Sunset Shimmer so we can have themselves a plan to escape this rotten place real quick before things went worse."

--Su Ji-Hoon, Twilight Long An to Sunset

Đỗ Hòa Hiệp is a Viet Cong member in South Vietnam that he would be one of Ducanger Prison V's prisoners after ARVN captured him and his comrades

Maybe he would be appeared-like mentioned when he and his comrades are being imprisoned in a jail room,so that ARVN imprisoned Sunset and her girls into this jail room after ARVN captured them.

However, he and his comrades find way to make jailbreak and attack ARVN guards