Talk to him and he will ask you if you’re interested in joining the cult. If you decide to check them out, you’ll meet the Grand Zealot. The location where the Children of Atom resides will be marked on your map. Upon talking to her, you will receive an invitation to go check them out if you’re interested. Talking to her will give you a little insight about the so-called religious cult called the Children of Atom in Far Harbor. You’ll first encounter the first member of the Children of Atom on your way to Acadia. Similar to other factions in Commonwealth, you will have an option to join them, though expect some conflict with other factions if you decide to be with them. One of the many factions that are featured in the recently released Far Harbor DLC of Fallout 4 is the Children of Atom.
