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Bill
Bill is a paranoid survivalist and mechanic who lives alone in Lincoln, a town he has rigged with traps against the infected. He owes Joel favors from their smuggling deals, so in Bill's Town Joel asks him for a car, and Bill joins you to find the parts.
Callus
Callus is the horse Joel and Ellie ride from Jackson County to the University of Eastern Colorado and beyond. He first carries Joel when Ellie runs off in Tommy's Dam, and Ellie names him on the road to the university.
Henry
Henry is a young survivor from Hartford who is trying to get his little brother Sam out of hunter-held Pittsburgh. He and Joel get off to a bad start in a brawl, then team up to escape the city, and he fights beside you through the end of Pittsburgh and The Suburbs.
Sam
Sam is Henry's 13-year-old brother, a quiet, anxious kid who becomes Ellie's first friend her own age on the road. You travel with him from the hideout in Pittsburgh through the sewers and suburbs in The Suburbs.
Tess Servopoulos
Tess Servopoulos is Joel's smuggling partner in the Boston quarantine zone and your companion through the first two chapters after the prologue. She is the one who talks Joel into taking Marlene's job, and she escorts Ellie with him across downtown Boston toward the Capitol Building.