Delaney (intro and male character endings) and Courtenay Taylor (female character endings only). War never changes." Tony Jay provides the narration in Fallout: Brotherhood of Steel and in Fallout 4, the narrative voices are provided by the Sole Survivor's male and female voice actors, Brian T.
In all games save Fallout: Brotherhood of Steel and Fallout 4, Ron Perlman voices the narrator, including the series-wide quote, "War. The faction in question, as seen in the opening cinematic, can be found in the greatest numbers around the city of New Vegas itself. To attain this armor, kill/steal from a member of the faction, and/or loot a suit from their headquarters location.
The "narrator" voices the intro cinematics, chapter overviews, and ending slides across the Fallout series. Spoiler free, the character on the box art is a member of an in-game faction with exclusive armor. Cutscenes are sequences in a game that consists of either cinematics or in-game footage.