Sentinel Power Armor

The Sentinel Control System, also known as sentinel power armor or sentinels, are a type of robot encountered in the Commonwealth. It is available in the Creation Club content "Sentinel Control System Companion" during the quest Malevolent Malfunction.

Background
The Sentinel Control System was developed in cooperation by West Tek and General Atomics International prior to the Great War. It served as an experimental system developed to supplement normal military deployments by utilizing existing power armor units. After the Great War, the technology was recovered by the Brotherhood of Steel, utilized in experiments focusing on fully unmanned missions. They were previously utilized by the Brotherhood Outcasts, of which the paint can still be seen.

The first experiment utilized a Sentinel unit with AI tuned for advanced friend/foe discrimination, as well as threat elimination drive. The mission attempted to test human interaction and reception of a commanding personality matrix by patrolling a 0.5 mile radius and performing routine peacekeeping operations. The result was not successful as the AI turned hostile towards nearby persons, and a remote shutdown was not possible, requiring manual decommission.

Three units supplemented a group of Brotherhood soldiers in Sector 11 of the Commonwealth for a 23 day long mission, charged with escorting Knight Maria Harper and Scribes Dawson and Vasquez. However, Dawson hacked into Maria and Vasquez' units and had all three ambush the two soldiers.

Characteristics
Sentinels appear as ordinary power armor frames and are able to equip any pieces of power armor. The majority of sentinel power armors are hostile and will attack on sight. The sole exception is Dawson's suit, which the Sole Survivor can hack into with the Pip-Boy 3000 Mark IV, after killing him and acquiring his passcode.

While plugged into the sentinel, it is possible to modify its loadout, switch between standby and escort mode, or change its personality matrix between that of a sentry bot, Mister Gutsy, Assaultron, or "memory free" mode. One is also able to get a Liberty Prime personality matrix in a miscellaneous objective triggered by reading the entirety of Dawson's holotape. The sentinel does not take up a companion slot while following the player character.

Locations

 * Two hostile sentinels are standing at an intersection, guarding the bodies of Maria and Vasquez, west of Lexington.
 * An inactive unit is at the Schoelt propane station. It can be hacked into and made a companion following the death of Dawson.
 * After the completion of Malevolent Malfunction, a hostile, rogue unit can be found and killed at Relay tower 0BB-915. This unit is unique in having the Liberty Prime voice as default as opposed to the Sentry Bot voices of the others, and carries a minigun instead of a laser rifle.

Appearances
The sentinel power armor appears only in the Fallout 4 Creation Club content "Sentinel Control System Companion."