The Drifters is the group of human who rejects the Galactic Alliance of Mankind for various reason and don't join them. Little is known about the Drifter but based on Ledo and Chamber's conversation the Drifter has much more advanced technology than the Earth people and on pair with the Galactic Alliance of Mankind.

Based on the analysis of Chamber when Ledo and him initially trap on Earth, the Drifter has several space colonies and space stations.