Senator Gall Trayvis is a character who appears in the Disney XD animated series Star Wars Rebels. He is a member of the Imperial Senate. He posed as a dissenter of the Galactic Empire and a voice of truth. It was however all an act and was in fact an Imperial agent who tricked Rebels into coming out of hiding so they could be identified and captured.
Hera knew he was a spy the entire time and later punched him in retaliation for mocking the legacy of Ezra Bridger's parents.