Vance Rego

Vance Rego was a member of the Cilpari Resistance, he was supposed to meet Winter on Cilpar and obtain aid in fighting the Imperials. He was also working for the local Imperials, as a double agent. He led Moff Fasel's stormtroopers, led by Major Ego, to Winter's location.

Source

 * X-Wing: Rogue Squadron (comics)