The following is based on the spin off novel by Keith R. A. DeCandido and some details might contradict canon.
The Dragonfly is a prototype one-man transport that appears in the Tiberium Wars novel.
It entered testing phases by the time the Third Tiberium War began. Visually resembling a cross between an Orca and a Juggernaut (but smaller than either unit), the Dragonfly is intended as a new Command and Control system.
It allows a Commander to personally be at the battle field, able to move from place to place. A holographic display showed the entire battle, and the Dragonfly allowed the Commander to move to area to area as needed. The technology was based off the technology that allowed Sergeant Brodeur to receive and read audio orders.