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.
Terrance approaches Tess, insists his deal is good and that he has the card. Tess tells him twice that now is not the time. He backs off, tells her not to get huffy-puffy, and returns to leaning on the wall to wait for another customer.
He and Tess seem to have traded before, and he spends his days in the slums trying to barter with whoever passes.
Terrance calls out to Tess soon after she and Joel bribe their way into the slums with ration cards. Further along you pass a woman who refuses bullets as payment, a stall selling rats as food, and a man who has sold all his guard dogs and tells Joel to come back next week. Another man greets Tess and gets an earful from his girlfriend for it.
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.
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.
Ellie Williams
Ellie Williams is the 14-year-old girl Joel is hired to smuggle out of Boston, and your companion for most of The Last of Us Part I. She was bitten weeks earlier and never turned, so the Fireflies believe her immunity could lead to a vaccine. You play as her in the winter chapter and in the Left Behind DLC.
Joel Miller
Joel Miller is the man you play for almost all of The Last of Us Part I. A hardened smuggler in the Boston quarantine zone, he takes a job escorting 14-year-old Ellie out of the city, and the drop-off turns into a year-long trip across the country to find the Fireflies.