Guardian Custode

Guardians are Forerunner constructs. At some point in 2558, a Guardian would have an encounter with the Swords of Sanghelios, led by the Arbiter Thel 'Vadam and ONI forces led by Jameson Locke.

Description
It has an angular head that is set upon a pair of phoenix-like wings. Multiple cords can be seen hanging from its body as well. Additionally, it is capable of producing powerful shockwaves.

Behind-the-scenes

 * First seen in the Halo Xbox One announcement trailer, this construct bears resemblance to the description of a war sphinx, albeit far larger. However, Jeff Easterling of 343 Industries later confirmed that it was not a war sphinx.
 * When asked about the Forerunner construct seen in the Halo 5: Guardians key art on Twitter, the game's Creative Director Josh Holmes replied that "The answer is in plain sight."

List of appearances

 * Halo 2: Anniversary
 * Halo 5: Guardians