Monitor

A monitor is an advanced artificial intelligence construct, or ancilla, created by the Forerunners to occupy special positions in their society. Monitors are characterized as being embodied in floating robotic casings, in contrast to most ancillas which lack physical form, only appearing as holographic representations.
== Overview ==
=== Appearance ===
A monitor's body consists of a roughly spherical shape that is concave on three sides, with an illuminated photoreceptor located on the front of the orb. A monitor's silvery metal covering is reminiscent of other Forerunner constructs, though their spherical shapes stand in contrast to the polygonal, angular shapes commonly seen in other Forerunner creations. Monitors were generally 58 centimetres (22.9 in) in length and 51 centimetres (19.9 in) in height.