Brotherhood Soldier (Fallout 4)

Brotherhood of Steel Soldiers are members of the Brotherhood of Steel living in the Commonwealth They begin appearing after the Sole Survivor triggers the arrival of the Prydwen by exiting Fort Hagen by the elevator leading to the roof.

Background
Brotherhood soldiers are responsible for collecting technology across the Commonwealth and enforcing the will of the Brotherhood. Soldiers who display exceptional loyalty and valor are promoted up the ranks, gaining gear along the way.

Initiate
Initiates are commonly found at low levels when traversing the Commonwealth, and when the player character reaches higher levels, aspirants begin to take their place as the "low level." Brotherhood ground soldier.

Aspirant
When the player character reaches higher levels, they replace Initiates permanently. A deceased Aspirant may be found in the Railroad HQ Escape Tunnel depending on faction choice.

Knight
Found on the Prydwen including during the entry scene.

Knight Sergeant
Knight sergeants slowly start to replace knights in Brotherhood of Steel areas, such as checkpoints, guarding the Prydwen, and Waypoint Echo.

Knight Captain
Knight captains begin replacing knights and knight sergeants as the Sole Survivor progresses in level. They will almost completely replace knights at level 50-56.

Knight Commander
The strongest knight variant in the game, they will completely replace the knight variants at around levels 56-60.

Paladin
One of the strongest Brotherhood NPCs in the game, at early levels, they will often be found guarding the tarmac surrounding Liberty Prime in a full set of sturdy combat armor of the Brotherhood variant.

Star Paladin
May have several pulse or plasma grenades. They level with the player.

Locations

 * The Prydwen
 * Boston Airport
 * Waypoint Echo
 * Cambridge Police Station
 * Mass Fusion building
 * The Island
 * Military checkpoints

Appearances
Brotherhood soldiers appear in Fallout 4.

Behind the scenes
Some of the generic dialogue between Brotherhood soldiers on the Prydwen are references to "frequently spoken" things said by voice director Kal-El Bogdanove.