Yurim (dark hair, red top) -> Hyunmin's part
Yuji (shortest, blue dress) -> Sandy's part
Sandy (dotted shirt, jeans) -> Yuji's part
Haeun (greenish top) -> Yurim's part
Hyunmin (flannel) -> Haeun's part
Yuji (leader, lead vocal, rapper - previously was in Baby Kara), Sandy (rapper) and Haeun (lead vocal) are the members who will be performing on The Unit. Hyunmin (main vocal) and Yurim (visual) will apparently not be competing.