Promethean Watcher

The Promethean Watcher is a Forerunner Sentinel variant. It is capable of healing and augmenting damaged allies and can catch and return enemy ordnance, such as grenades, with a gravity-displacement field. Watchers are typically deployed from the armored carapace of their Promethean Knight commanders, assisting them with aerial combat screening and often forcing opponents to engage the Sentinel first. Watchers were encountered on the shield world Requiem in summer 2557.

Trivia

 * The Watcher, along with the Promethean Crawler, was first seen in a leaked image from McFarlane Toys. However, it was first mentioned several months earlier in Halo: The Essential Visual Guide.
 * An outline of the Reclaimer symbol, in reality the Marathon logo, appears on the Watcher's midsection despite Bungie owning the rights to the Marathon franchise.

List of appearances

 * Reclaimer Trilogy
 * Halo 4