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.
The strip is four photo booth shots of Laura and the pharmacist. On the back she asks him to think of her while she is away and teases that she will miss him, though not too much. It lies with his body in the back of the American Princess store, and you can pick it up once you have taken the Pharmacy key from him.
In Back in a Flash, Ellie spots a first aid kit through the glass of the pharmacy's locked back door. A note left nearby gives the lock code for the American Princess store next door and explains that the pharmacist was shut in there after he attacked someone. The store is thick with spores, which Ellie's immunity lets her ignore, and the pharmacist lies dead at the back with the key and Laura's photos on him. A clicker wanders past as she leaves.
Drew Beckwith
Drew Beckwith is the dead pharmacist Ellie finds in Left Behind, locked in the American Princess store at the Colorado Mountain Plaza. You need the Pharmacy key from his body in Back in a Flash to open the drugstore and keep going.
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.
Eugene Ellis
Private Eugene Ellis is a soldier from a FEDRA helicopter crew that crashed at the Colorado Mountain Plaza. In Left Behind, Ellie pieces together his story from his captain's notes and his own recordings while searching the mall for a medical kit for Joel.
Larry Caulfield
Chief Warrant Officer Larry Caulfield is a member of the FEDRA helicopter crew that crashed at the Colorado Mountain Plaza. In Left Behind, Ellie learns what happened to him from Captain Regan Francis's notes.