Judock

Judock acted as a spy for Captain M'Quve in the Federation forces. He acted as a liaison between M'Quve and Federation General Elran in the lead up to Operation Odessa. Shortly before the battle of Odessa, Amuro Ray and Sayla Mass witnessed Judock departing in a Federation plane from Zeon controlled territory. They follow him to the Big Tray and Judock is arrested by other Federation soldiers. His ultimate fate is unknown.

(Source: Gundam Wikia)