Holo-drone

Holo-drones are small, mobile, spherical drones capable of remote use, using anti-gravity generators for propulsion, used for the creation of high-quality holographic real time images.

Background
They are used for several functions, allowing face-to-face communication over relative short distance, providing holographic duplicate decoys of important personnel, and engaging enemy forces without risking allied personnel.

Sesa 'Refumee, the Sangheili leader of the Heretics based on Basis and a gas mine on Threshold, used one of these to taunt a Covenant Special Operations assassination team, and later used another two to assist him in battle as he tried to kill the Arbiter but failed.

They are relatively weak in battle and a direct shot will result in static washing over their form, betraying their holographic nature. By using an unknown technology, these holo-drones can interact with the environment around them and even attack and kill the player. Though they possess rudimentary shields, and are somehow capable of using actual weapons, they don't seem to be dedicated combat equipment. Physically, they resemble inactivate plasma grenades able to fly through the air fairly quickly, though slightly larger.

Trivia

 * The Holo-Drone may be inspired by holograms from Total Recall.
 * The Hologram armor ability appears to be a less sophisticated version of this technology, producing a holographic decoy of the user that is only able to move in a straight line.

Gallery
 File:1220655006 Hologram.jpg File:1220655526 Hologram2.jpg 

List of appearances

 * Halo 2