Builder

The Builders were the highest rate of the Forerunners, considered to be the most powerful in terms of intelligence, wealth, and political power. As their name suggests, the Builders were responsible for designing and constructing the myriad of technologically advanced structures and objects seen throughout the Milky Way galaxy, including the Halo Array. Builder forms were generally tall, slender and more refined and sophisticated in appearance than Warrior-Servants. The chief of the Builder rate and all its guilds was known as the Master Builder. The Master Builder was often considered the most powerful Forerunner in the ecumene. The last Forerunner to hold this title was Faber.

Builders achieved their power early in Forerunner history. During one of the Forerunners' civil wars over 500,000 years before the Forerunner-Flood war, the Builders purged the other rates of their ancient rituals while retaining their own. The Builders' power continued to accumulate during the millennium-long human-Forerunner wars, as they supplied the weapons. After the wars, the Builders, led by Master Builder Faber, designed a new form of superweapon known as Halo in preparation for the Flood's inevitable return. This plan was opposed by the Didact and the Prometheans, who instead proposed the construction of numerous shield worlds as a strategy to combat the Flood. The Prometheans lost this political conflict after several millennia, leaving the Master Builder effectively in total control of the Council.

Builder Security was an organization of Builders who conducted security and combat matters. Many members of Builder Security were former Warrior-Servants who migrated into the Builder rate after the Warrior rate was diminished in the wake of Faber's takeover of the Ecumene Council and the Didact's exile.

Known Builders

 * Master Builder Faber
 * Phylarch of Builders
 * Bornstellar's family
 * Bornstellar Makes Eternal Lasting (Formerly)
 * Bornstellar's father
 * Dawn-over-Fields
 * Keeper-of-Tools
 * Maker's family
 * Maker-of-Moons
 * Maker's father
 * Trial's family

List of appearances

 * Halo: Cryptum
 * Halo: Primordium
 * Halo: Silentium
 * Halo: Rebirth