While Vault Cave has no background information and no relevance to any of the plot, its existence is spoken of in rumor even in towns separate from Vault. Early in Golden Sun, when the eruption of Mt. Aleph transpires and Vault's townspeople panic, the Vault gang of thieves go on a stealing spree, and while some of the stolen goods are hidden in the loft of the Inn, others are stored away "in the cemetery" that is where the entrance to Vault Cave lies hidden, perhaps indicating that the cave was temporarily used as a cache. After the thieves' arrest, the townspeople discover and bring back all the items from the cemetery, but it is possible that the Vambrace found deeper in the cave is one piece of stolen armor that was not recovered.