They are one of the three Resistance factions that are actively hunting The Chosen. They are former ADVENT soldiers who learned how to remove the chip that connects them to the alien's Psionic Network. As a result, they have been liberated from the aliens' control and seek independence from them.
They wear customized ADVENT armor in order to distinguish themselves.
As a Hero Unit Edit
Skirmishers are a hero unit class in XCOM 2. They are armed with the KAL-7 Bullpup and a Ripjack as their primary and secondary weapons respectively. Their abilities are specialized in order to gain additional actions for their turn and be able to make use of them effectively.