Of the millions of religious cults of Hydra, some of the most prominent worship the Star–Beasts, spacefaring creatures that have been called "space monsters" by some. To allow Hydrans to more effectively worship these creatures, the Hydrans have built huge force field enclosures called Preserves to contain the Star–Beasts.
The Keepership was an order of starship captains dedicated to preserving the Star–Beasts and protecting the Star–Beast cults. They maintained the preserves, capture young Star–Beasts, and make certain they were held in livable conditions. Although the Keepership was not a particularly politically important order, their bravery was unquestioned and has earned them a place of honor in Hydran society. (TOS video game: Starfleet Command (game))
Also, the Hydran Keepership sought an artifact (or its secret thereof) that could allow them to have an infinite maximum evacuation capacity. It turned out to be an holodeck technique called Russian-doll holodeck. (RIS Bouteina: "New York Convention")
One of the most celebrated units of the Keepership was led by a duke and was called the Knights of the Phaser. The Knights of the Phaser fought the House of Korgath in 2386. (RIS Bouteina: "Drug Wars")