Sergo (セルゲイ Serugei) is a supporting character in Secret of Mana. He was once a pirate who sailed the seas, but was captured by the Republic and forced to work in the engine room of the Sandship. When the party is found wandering around the Kakkara Desert, Randi is put to work in the engine room with Sergo, who causes a distraction so that the hero can slip past the guards.
After Geshtar's forces attack the Sandship, Sergo takes to the seas again and can be seen when the party explores the Lost Continent.