Prerequisites: Max out Helene's level 2 friendship
Reward: None
Unlocks: Helene level 3 friendship
The Helene saga continues. Still an enigma, Helene's habits remain the same after completing the first friendship quest. In theory she's supposed to spend much of the day tending to the Arcade at the Tavern, but Helene seems to wander the south of Moonbury Town a lot, so she may be difficult to find if you don't deploy your dog.
Track down and befriend Helene enough and a notice will appear on the Bulletin Boards of Moonbury, inviting Helene's 'sweetheart' to visit her. (Not Dean. Poor guy.) You, of course, are the sweetheart, and Helene wants to see you between 13:00 to 21:00, any day of the week. Check the second floor of the Tavern to trigger the cut scene.
Helene remains a sketchy character, admitting that she's been reading Dean's classified documentation without his knowledge. She's learned of an artefact out in Barren Wasteland, and she wants you to trek out there and find it for her. You'll have to have fixed the bridge into Barren Wasteland in order to fulfill her request.
Head into Barren Wasteland and proceed to the Heart of Barren Wasteland Fast Travel point, halfway along the path through the island. Northwest of the Fast Travel point is a small clearing with an old oil derrick. Beside the derrick is a tiny hole that you can check to find a Tiny Crystal.
Take the Tiny Crystal back to Helene. She quickly decides that it's of no interest to her, but it might be of interest to Myer. Take the Tiny Crystal to the mayor - likely at Town Hall - and he'll identify it for you, disappointing Helene and ending the quest. The pair of you will move to the next step of your relationship in the process.