Watchers

The Watchers were the jailers and marshals of night elf society until shortly after the Third War.

They guard the barrow-prisons of the night elves. Though their members came from a number of backgrounds, their original members came from the Sisterhood of Elune.

History
The leaders of the kaldorei realized the dire potential Illidan could wield, especially after he had remade the Well of Eternity on Mount Hyjal, which had previously destroyed nearly everything they had accomplished, and wished to ensure that he would not escape ever again.

To this end, Malfurion Stormrage requested that Maiev Shadowsong form the Watchers, an elite group of guardians dedicated to guarding Illidan and other imprisoned criminals. Initially this group was picked from among the Sisters of Elune. There were also some wildkin aiding the night elven guards. Maiev was named warden (a rank to which a select few others were promoted, but she herself selected some to share the title) and would answer only to the official head of government.

In the prison of the Barrow Deeps, the keeper of the grove Califax personally guarded Illidan's cell.

There were also some other dungeons containing dangerous creatures imprisoned in the Deeps.

The Watchers were never a large group, and almost all of them were slain in their quest to recapture Illidan after his release. The order has been reformed as the jailors of Fandral Staghelm.