Natt is a member of the Sigma Force and a villain in Dragon Ball GT.
Natt and the rest of the Sigma Force, Nezi, Ribet, and Bizu, were sent by General Rilldo to take care of Goku, Pan, and Trunks after they landed on Planet M-2. They managed to capture Goku and Trunks, but left Pan behind.
Natt was later sent to take care of Pan after she infiltrated Rilldo's base. He fights her rather easily by predicting her moves, however Pan manages to figure out that Natt can only predict moves she has used before. By using a few of her gradnfather's moves, Pan destroys Natt.
Natt can fly and has a rocket launcher built into his chest, as well as the ability to extend his arms.