Originally the Guardians were built to record the legacy of the Precursors. Over time this idea would be lost to the Foreunners, and eventually the Ecumene would use the Guardians to keep lesser species in-line. To help police solar systems, the Forerunners hid Guardians on numerous planets throughout the galaxy, and seemingly on every planet with life. Some of these planets include Meridian, Sanghelios, Conrad's Point, Laika III, Ursa IV, Oban and Trevelyan.
This continued through to October 2558. Within a 72 hour period, five colonies (including Oban, Ursa IV, and Conrad's Point) experienced Guardian awakenings. On October 25, 2558, Blue Team boarded the Meridian Guardian, the first Guardian Cortana specifically chose to activate. Following this activation, five more colonies were hit, bringing the total to 11. On October 27, Fireteam Osiris would travel there on the Sanghelios Guardian. By this point, Cortana had claimed the Mantle of Responsibility for the Created, and began to send them back out into the galaxy.
Upon arriving at their destinations, the Guardians began to disable electrical grids and military equipment. At least two were sent to Earth and one was sent back to Sanghelios. One Guardian was also used to rip Installation 09 out of Slipspace.
Function and BehaviorEdit
The Forerunners used the Guardians to keep troublesome worlds in-line with Forerunner laws during the age of their Ecumene.
The ancillas of the Guardians were known to be "strange" and "cold" and had limited personality and empathy. The ancilla were also influenced by the Domain to become some of the best suited AIs to enforce the Mantle of Responsibility.
Guardians can be deactivated by Huragok disabling the gravitational field that holds the construct together, however this requires direct physical contact with the armature mainframe, the part of the construct that looks like a face. 
A Guardian consists of many polygonal pieces floating in unison to form an upright bird-like shape. On all parts of the structure there are massive glowing circles having unknown functions. Their size is described as the size of a skyscraper and are made completely out of Forerunner metal. This metal was magnetic.
Armament & DefenseEdit
They also possess EMP capabilities able to sabotage large swaths of technology on a planet and its surrounding space. The EMP's range is roughly a planet's hemisphere. The Guardian can undulate various parts of it's body as a defense mechanism against boarders. The exact armament of the Guardian is as follows:
They are capable of slipspace travel through a self-formed bubble.
E3 2015 Campaign GameplayEdit
- Halo 5: Guardians
- Announcement Trailer (First appearance)
- Halo Wars 2
- Halo: Legacy of Onyx
- Halo: Bad Blood
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo, Page 88 & 89
- ↑ 2.0 2.1 2.2 2.3 2.4 Halo 5: Guardians - Level: Genesis
- ↑ 3.0 3.1 Halo: Legacy of Onyx - Chapter 3, Page ???
- ↑ Halo 5: Guardians - Levels: Reunion, Genesis, The Breaking, and Guardians
- ↑ Halo 5: Guardians - Level: Osiris
- ↑ Halo 5: Guardians - Level: Unconfirmed
- ↑ Halo 5: Guardians - Level: Reunion
- ↑ Halo 5: Guardians - Level: Battle of Sunaion
- ↑ 9.0 9.1 9.2 9.3 Halo 5: Guardians - Level: Guardians
- ↑ Halo: Fractures - Extraordinary Tales from the Halo Canon - Rossbach's World, Page ???
- ↑ 11.0 11.1 Halo: Bad Blood - Chapter 1, Page ??
- ↑ Halo Wars 2 - Level: Last Stand
- ↑ Halo: Legacy of Onyx, Pages 381 & 382
- ↑ Halo 5: Guardians - Levels: Evacuation and Battle of Sunaion