Game Spoilers Up AheadEdit
Ashley is a fellow student Sal meets in Chapter 2 while heading inside Todd's house to ask him about the ghosts in search of help. Not a lot is known about her but she seems nice through first interactions.
In chapter 3 Ashley is shown to have a bit more personality, along with a better role of helping Sal with his bleeding face when punched by Travis, and helping with the bologna mystery.
At the end of Chapter 3, it is revealed that she will testify against the Sally Face Killer.