From Halopedia, the Halo wiki

An illustration of a Forerunner Preceptor.
A Forerunner Preceptor

A Preceptor was a Forerunner who had refined and specialized their body and mind to become a living paragon of scientific, artistic, or martial skill.[1]

Preceptors were categorized as tier-two Peacemakers, powerful constructs used to enforce the Forerunners' vision of the Mantle of Responsibility on the galaxy. Along with Guardian Custodes, Preceptors were charged with monitoring and fencing off the activity of lesser species within pocket empires.[2] When a developing civilisation was encountered, they may be employed to guide that civilisation's development in line with the preferences of the Ecumene.[3]


  1. ^ Halo: Warfleet, page 8
  2. ^ Halo: Warfleet, page 88
  3. ^ Halo Encyclopedia (2022 edition), page 386