Huragok

&nbsp The Huragok, better known as Engineers, defected to helping the UNSC after the first Battle of Earth. The Engineer that defected had merged with New Mombasa's superintendent 'Vergil', it gave ONI all the information about the Ark, and the Great Journey.

The Engineers are basically organic supercomputers.

In Halo wars, the Engineer are seen as a support unit that heals all units it comes near. The only way that people usually see an Engineer with a star is when an A.I. builds them and the Rebel Leader skull is active.

In Halo 3 ODST, the Engineer was forced to help the Brutes against its will. When the Engineer's allies come within a certain radius of it, an overshield is casted over them. The overshields that they give can also protect other Engineers.

In Halo Reach, the Engineer is willingly helping the Elites, and its shielding ability still applies to all, but its fellow Engineers.

In both ODST & Reach, Engineers can be seen in a special form of armor, this is a special explosive suit. When the Brute leader is killed, the suit automatically self destructs, but their armor doesm't explode at such a high level in Reach.

During the early days of the Covenant, the Engineers replaced the Drones as those in charge of Engineering and Matainance. After the replacment of the Drones, several of the Drones attacked an Engineer (Lighter Than Some) that had befriended a Grunt (Dadab), ending with the murder of 'Lighter Than Some'.