Protector Sentinel (Trove)

Protector Sentinels are Forerunner machines similar in design and purpose to Sentinels.

Overview
Protector Sentinels are smaller, faster, and occupy less of the population limit, although weaker in terms of firepower. In direct combat, they are less effective than Sentinels. It is in the support role that they excel - their Y-button ability is to attach themselves to one of the player's other units, following it in action. Only one can be attached to a single unit one time, however appointing one to a spartan and a vehicle and having that spartan then enter the vehicle will give that vehicle two protectors. This only works when it is your vehicle, when you jack an enemies vehicle the protector is destroyed.

For the most part, they must be summoned from a Protector Plant. However, upgrading the Prophet of Regret with Ancestral Perversion 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 colored 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.

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

Spartan and Regret uses
Unlike many units, which can only have one Protector, Spartans and the Prophet of Regret are able to get two Protector Units attached to them though a special way. -Regret: research Ancestrial Preversion will automatically equip him with 2 offensive protectors. If equip him with any protector unit before researching that upgrade, only 1 offensive protector will appear. -Spartans: Normally, they can only be equipped with one Protector, but when they hjiack or takeover any vehicle, the Spartan's protector unit is still attached to him, but another protector unit can be assigned to the captured vehicle, letting them have two Protector Units. If that vehicle is destroyed, they still eject as normal, but they only keep the Protector unit that was originally assigned to him.

Trivia

 * Players can produce them inside the Protector Plant found on the map Labyrinth.
 * If a unit is being airlifted by the Transport power, the protector unit will follow the pelican, providing it with its capablities, until the Pelican reaches its destinination, which it goes back to the original unit.
 * The shield of a protector Sentinel resembles that of a Bubble Shield.