Initiate of Mysteries

Initiate of Mysteries is a side quest in Fallout 76.

Quick walkthrough
Your mentor is in Lewisburg. She's dead and hard to find. Try to stay in the woods and come at her location from behind, there's plenty of creatures on the street near her. She's in an area where a street faire was going on. Lots of vendors had set up to sell stuff, but most of it isn't loot. It's near a brick building that looks like a government center, especially since there's lots of flags around the outside. She's behind a display of paintings, after a display selling bird-houses.