Huragok (Facticius indoles)


Biological information
Physical description
Average height

9'0" [1]


125 lb (57 kg)[2]

Skin color



Gas filled bladders that allow flotation, six appendages, small snout, six eyes

Military and political information

Neutral but used by Covenant

Notable individuals
Other nomenclature
  • Engineers
  • Boo-Bags
  • Loogie
  • Slippery Suckers
  • Floating Squids
  • Floaters
"...They are some sort of biological supercomputers. Slaves, prisoners, I don't know, but they don't like the Covenant anymore than we do."
— Veronica Dare, description of Huragok

Huragok (Latin: Facticius indoles, meaning "Man-made character"), known to Humans as Engineers, are a race of biological supercomputers that were created by the Forerunners. They are the only known non-combatant race of the Covenant, though some are rigged to explode like suicide bombers.


Huragok are the scientific and engineering backbone of the Covenant and its economy. They float via bladders that contain a mixture of gases lighter than air, and their four tentacles are able to split into many fine cilia, with which they are able to manipulate machinery on a near-microscopic level. Engineers are capable of quickly learning the functionality of new technology. On one occasion, an Engineer was observed by John-117 dismantling a vehicle's engine, assembling it into various other working configurations and then returning it to its original state in a matter of seconds. While it is generally held that only the San 'Shyuum  are high enough in the Covenant Hierarchy to handle and manage Forerunner research and technology, in reality it is the Huragok who must excavate, unlock, and transport Forerunner artifacts (a fact only known to higher-ranked officers and leaders within the Covenant, due to its sensitive nature), though the San 'Shyuum insist that any admission of that fact is heresy. These remarkably helpful and docile aliens are exceedingly patient, rarely communicate with other species, and are almost single-mindedly devoted to their work.

Huragok have little interest in taking sides in conflict; they appear to draw no real distinction between friend and foe, and prefer to spend their time inspecting or repairing technology. However, they will utter a high-pitched keening sound whenever a Forerunner artifact is threatened. They are apathetic to any sort of combat, and tend to just float along with a single goal: fixing things. In one encounter, a Huragok repaired John-117's damaged shield generator and then floated away; the rather unlucky Huragok was later shot by Lieutenant Haverson to prevent it from possibly giving the specifications of the Spartan's improved shield technology to the Covenant. If shot at in a firefight, Huragok make no attempt to defend themselves, but rather curl up in fright and try to float to a safe distance.

Their concentration has been described as "a trance-like reverie" by the few who have witnessed it. They usually communicate only with San 'Shyuum, a fact that may contribute to the balance of power between Sangheili and San 'Shyuum, and will usually ignore anything that is neither a San 'Shyuum, a Forerunner artifact, nor a machine.

The abilities of the Huragok are not limited to their skills to fix things; they are also able to absorb data from a computer or an A.I., and combine it with their own biological "data". One such incident occurred when one Huragok combined its knowledge with the dumb AI of New Mombasa, the Superintendent. During a mission to recover a living Huragok, Captain Veronica Dare described the species as "biological supercomputers".


The Huragok were created by the Forerunners prior to the first activation of the Halo Array. They have been found to be living inside of Onyx's Dyson Sphere shield world for 100,000 years. It has been suggested that the Covenant found the Huragok first by infiltrating a separate Dyson Sphere. During the Harvest Campaign, the Covenant access a shield world, trying to exploit and steal all technology they have, including shields.

Anatomy and physiologyEdit

The Engineers are actually not a natural, biological species at all, but rather an artificial life form created by the Forerunners. While they possess no true tissues or organs, their nano-mechanical surrogates so closely mimic their biological analogs that they seem almost indistinguishable to observers. Multiple gas-bladders serve as their method of locomotion, allowing them to float through the air even after their deaths. The bladders also serve as part of their respiratory system; if their gas bladders deflate, they will asphyxiate and die.

They have small heads with six dark eyes, and four tentacles that can split into very small, near-microscopic cilia. The Engineers use these cilia to construct, repair, or rebuild nearly anything they can grasp. They can take apart whole vehicles and rearrange their entire structure in a matter of seconds, with the resulting machines still operating at least as well as they did before. They learn at an unprecedented rate, and store that information for future reference if ever they need to repair the same thing twice. They are capable of surviving in at least oxygen and methane-rich environments, though they cannot survive in a vacuum.

Huragok are not normally a tactical threat and are hardly ever seen in combat situations. Most UNSC soldiers make a point of avoiding intentionally harming Huragok if possible. Unlike the majority of the Covenant races, they do not regard humans as enemies; during the John-117's assault upon Ascendant Justice, one even aided the SPARTAN-II by repairing the shield generator on his MJOLNIR armor and fixing the SPARTAN's current weapon, a broken Needler. However, Lieutenant Haverson killed the Engineer stating that it had learned all about the MJOLNIR shield technology, which was superior to the Sangheili Personal Energy Shield, and could not be allowed to relay that information. A Huragok named Lighter Than Some attempted to aid the Humans in an attempt to bring peace; he even made them a peace offering, but it was ironically converted into a weapon, the Brute Chopper.

Huragok "reproduce" by gathering the needed (or available) materials from their surroundings to "build" another Huragok. This new offspring is then filled with a precise mixture of lighter-than-air gasses. The initial buoyancy of the newly born Huragok is what it is named after. Three known Huragok names have been revealed so far. Those who sink are named 'Far Too Heavy'. Those whose buoyancy is about right are named 'Easy to Adjust'. Lastly, those whose gas mixture causes them to exhibit extreme buoyancy are named 'Lighter Than Some'. Up to three Huragok take part in this process, relaying all the information that they have learned to their "offspring". Given sufficient raw materials, a pair of Huragok can produce a unified replica of themselves in approximately 45 minutes; the addition of a third Huragok cuts the time down to thirty minutes. Understandably, it is advantageous to have as many Huragok contribute to this process as possible, raising the "intelligence" of the offspring.

When deployed during large-scale archaeological expeditions, Huragok make use of large Recharge Stations, where they rest, repair each other, and share data between forays.

Huragok blood is luminescent blue-purple in color.

Huragok are bioluminescent, and in dark conditions their heads and tentacles emit a bright bluish glow, which seems to pulsate when the Huragok is calm and dim when it is frightened. The cilia on their tentacles give off a pinkish-red light as well.

Though the inner workings of an Engineer's internal macroscopic biology remain a mystery, it is known that they are capable of using the gas sacks that keep them afloat for anaerobic respiration. This method is painful, dangerous, and apparently only used as a last resort. Only one usage of the ability has been described: when Lighter Than Some used anaerobic respiration to keep Dadab alive after the latter's methane tank depleted. Huragok use thousands of microscopic organisms to digest the food they consume, producing many gases, including methane, as a by-product.


Huragok can communicate with other Covenant species, such as Grunts, and perhaps with other Huragok, by flexing their limbs in various directions, bending and overlapping to form the specific formation for each word, much like Human sign language. Their gas sacs can also swell and deflate at times of great emotion, suggesting another, more subtle method of communication. Huragok can also communicate using whistle sounds, as shown when Cortana used a Covenant SHIPCOM speaker to verbally communicate with a Huragok. 


Huragoks are an extremely valuable asset to a crew as they enjoy fixing things immensely. They are described as caring about nothing else. However, it is shown that they are very peace loving and have a great respect for life in general. Lighter Than Some even refuses to play a game that would kill non-sentient pests. However, they can be pushed into violence when a friend is in danger, as demonstrated when Lighter Than Some saved his friend, Dadab, by killing the human, Henry Gibson, with a hunting rock

Huragok have also been known to display great compassion and caring for one another. Dr. Endesha observed six Huragok selflessly give their own lives while attempting to disarm a bomb attached to another, which detonated after its removal and killed all but the seventh Huragok.