Tyrgius

 was an alien. He visited Athens in 421 BC and his disguise pointed him out as he was too good looking. He was asked to visit Cleon by his servant Telephus. Cleon wanted him to help by giving Cleon advance weaponry against Sparta. He was a beetle, his disguise was telepathic, but after Cleon beat him up it started to break down. (AUDIO: Mask of Tragedy)