UrDidact seems like a good guy.

Librarian hated The Lord of Admirals' name.

A Forerunner of an old, disestablished rate that became subservient to the Builders theorized much about ancient ancient Human history and their origins. They shut her up.

Faber is a dick.

There's a Forerunner form with three legs. His armor can resist quite a beating, supposedly. Ur gives mad props.

The Librarian and six others manned an advanced research vessel, Audacity, to determine the source of the Flood in the Tarantula Nebula (nifty John reference) in the Large Magellanic Cloud. They discover an impossibly old fleet of thousands of derelict Forerruner warships clustered together. Signs of Precursor neutral physics and organic life reside within the system.

Ur and Catalog, the tripod I previously spoke of, were aboard a discarded Builder ship orbiting an infested world. A Forerunner formation drew near to intercept, but something, reportedly 50,000km in diameter, was closing in on their position. They thought it may be Precursor.

Pretty clear that the Librarian is our God and that the Ecumene is an fictional ancient analog to the United States since the Spanish-American War.