Lonu Vanu invites you to the Zundu village that they may express their gratitude for your actions.
This quest is available if you have completed the quest Familiar Faces.
Starting the Quest
Talk to Lonu Vanu in the Sea of Clouds (via airship from the Athenaeum Astrologicum in Ishgard) to begin the quest.
Speak with Alphinaud
Talk to Alphinaud to proceed.
Speak with Lonu Vanu
Go north along the narrow slope, then go northeast to where the orange arrow is pointing in the minimap. Talk to Lonu Vanu. There will be a cutscene.
Speak with Lonu Vanu Again
Go north and attune to the Aetheryte, then go to the quest icon on the map and talk to Lonu Vanu. There will be a cutscene.
Next Main Scenario Quest
After you complete the quest, talk to Alphinaud to accept the next quest: Black and the White.