Character collectibles are 33 letters, photos, cards and books that belong to the people you meet. Most sit inside friendly camps, and a handful unlock on their own during the story.
These pieces fill in backstory the cutscenes skip, such as Iron Mike's late wife, Addy's family and Kouri's life before the Militia.
Jessie's two items and Sarah's photo come from Iron Butte near the end of the story.
Addy - "Straying From the Path of God"
A Christmas card to Addy from her parents, kept in the infirmary at Iron Mike's Camp in Lost Lake. It is on the upper floor, on a table at the top of the stairs beside a green book.
Addy - "The Old Generator"
A note from Rikki to Addy about the noisy old generator, kept in the infirmary at Iron Mike's Camp. It is on the ground floor, on top of the right-hand shelf before the exit.
Image: Bend Studio / PlayStationAlkai - "A Portrait of Salome"
A set of charcoal drawings by Alkai Turner, Tucker's right-hand man at Hot Springs in Belknap. They are on a table beside the camp merchant, next to a yellow light stand.
Boozer - "My Beautiful Wife"
A picture of Boozer's late wife, Joany, kept in his things at Iron Mike's Camp in Lost Lake. It is on the table beside your own bed in the room you share with Boozer.