Menas is one of the two pirates who join cause with Pompey, helping to give him the mastery of the seas.
He is much closer to Pompey than Menecrates. He and Enobarbus have fought before, but after the agreement between Pompey and the triumvirate, they chat quite amiably. He wishes that they had fought, as he believes that Pompey is giving away his power for nothing, and does not believe that the bond between Caesar and Antony will last, since he does not think anyone would give up Cleopatra for Octavia. He offers to Pompey to cut the ropes holding the ship to the land, set sail, and massacre the triumvirate and their followers; when Pompey refuses, he swears to never follow him again. He offers Enobarbus a bed for the night in his cabin afterwards. He may join Caesar and become part of his council of war, if one of the Folio’s stage directions can be trusted.