Protector Sentinel (Trove)

Protectors are Forerunner machines similar in design and purpose to Sentinels. They are smaller, faster, and occupy less of the population limit, but are also weaker. In direct combat, they are less effective than Sentinels. It is in the support role that they excell - their Y-button ability is to attach themselves to one of the player's other units, following it in action.

For the most part, the Protectors must be summoned from Protector Factories. However Upgrading the Prophet of Regret with Ancestral Perversion in the game Halo Wars will equip him with two of these guardians for his personal protection. Similar to the Sentinel Majors, they are equipped with onboard beam weapons which fires a single blue coloured pulse beam at a time. They are of similar size and shape to the Constructor but slightly bigger. It has several laser guidance systems that scan for any threats.

There are three different variants of the Protector:
 * Offensive Protector - when attached, it attacks units near its host with a pulse of laser fire.
 * Shield Protector - projects a rechargable energy shield around its host unit.
 * Healing Protector - recharges its host's health when out of combat.