47 characters in The Last of Us Part I.
Laura Brown
Laura Brown is the partner of the dead pharmacist in Left Behind. Ellie finds a photo strip of the couple with a note from Laura on the back, the Pharmacist's note, in the American Princess store during Back in a Flash.
Malick
Malick is a tough in the Boston slums who tries to block Joel's path in The Quarantine Zone. Tess knows him and sends him back to his seat with a single word.
Maria Miller
Maria Miller is Tommy's wife and the leader of the settlement in Jackson, Wyoming. You meet her at the hydroelectric dam in Tommy's Dam, where she first holds Joel and Ellie at gunpoint before learning Joel is her brother-in-law.
Mark
Mark is a Boston quarantine zone resident who is only talked about. In The Quarantine Zone, Joel can overhear Ronnie telling a friend that soldiers caught Mark using fake ration cards.
Marlene
Marlene is the leader of the Fireflies, the militia fighting the military in the quarantine zones. Wounded in Boston, she hires Joel and Tess to smuggle Ellie out of the city in The Quarantine Zone, and you meet her again at the Fireflies' hospital in Salt Lake City near the end of the game.
Mastros
Captain Mastros is the senior FEDRA officer left in the Pittsburgh quarantine zone. He appears only in two artifacts from the Pittsburgh chapter: the Abandon zone note he wrote and the Mob attack note about him.
Ramirez
Ramirez is a FEDRA patrol soldier who catches Joel, Tess and Ellie just outside the Boston wall. The ambush happens in the Outside section of The Outskirts, and it is the moment Ellie's infection scan becomes a problem.
Regan Francis
Captain Regan Francis is the medical officer who commanded the FEDRA helicopter crew that crashed at the Colorado Mountain Plaza. Most of the Left Behind artifacts in Colorado are her reports and recordings, which Ellie finds while hunting for supplies to save Joel.
Riley Abel
Riley Abel is Ellie's best friend from the military school in the Boston quarantine zone and the co-star of the Left Behind DLC. She appears in the Liberty Gardens flashback chapters Mallrats, Fun and Games and Escape from Liberty Gardens, and Ellie brings her up during the main story.
Robert
Robert is an arms dealer and smuggler boss in the Boston quarantine zone, and the man Joel and Tess hunt down in The Quarantine Zone. He owed them a cache of guns, sold it to the Fireflies instead and sent men to attack Tess, so the pair go after him at his warehouse on the docks.
Ronnie
Ronnie is a short-tempered Boston quarantine zone resident Joel passes near a checkpoint in The Quarantine Zone. If you stop to listen, he is gossiping about his friend Mark, and he snaps at Joel for staring.
Rose Graham
Rose Graham is the KATX Channel 2 News reporter Sarah watches on Joel's bedroom TV in Hometown. Her live report from downtown Austin is the first real sign that the riots are something worse.
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.
Sarah Miller
Sarah Miller is Joel's 12-year-old daughter and the character you control at the start of The Last of Us Part I. In Hometown you walk her through the family house near Austin on the night the infection breaks out, before Tommy drives the family into the chaos.
Sean Brendon
Warrant Officer Sean Brendon is the pilot of the FEDRA helicopter that crashed at the Colorado Mountain Plaza. In Left Behind, Ellie finds his body in the wreck while searching for a medical kit, and he is named in the captain's notes.
Seth
Seth is a Jackson resident on guard duty at the hydroelectric dam in Tommy's Dam. He is the man beside Tommy on the wall, rifle trained on Joel and Ellie, when they first reach the gate.
Skully
Skully is one of David's men in Silver Lake. Joel captures him with Blondie at the cabin resort in Lakeside Resort and forces him to reveal where Ellie is held.
Susan
Susan is Kyle's wife and one of the founding families of Ish's sewer community under Pittsburgh. In The Suburbs she appears only in notes: the Rain catcher note written to her and the Survivors note written about her.
Terrance
Terrance is a black market trader in the Boston slums who tries to sell Tess something as she and Joel head to Robert's warehouse in The Quarantine Zone.
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.
Tommy Miller
Tommy Miller is Joel's younger brother, a former Firefly who now helps run the settlement at Jackson, Wyoming. He drives Joel and Sarah through the chaos of the prologue, and twenty years later Joel tracks him down at a hydroelectric dam in the chapter Tommy's Dam, hoping he will take Ellie to the Fireflies.
Warren
Warren is a Firefly fighter and friend of Marlene whom you see captured by FEDRA soldiers in The Quarantine Zone, under a bridge along the Boston waterfront.
Winston Asher
Sergeant Winston Asher is a FEDRA soldier who once kept a camp and a horse in Boston's Liberty Gardens mall. In Left Behind, Ellie and Riley find his empty camp in Mallrats, and his notes show how he saw the two girls.