The couple longed to migrate off the island but lacked the financial means to do so due to their measly income. Eventually, they were assisted by the misthios Kassandra in acquiring a necklace lost at sea by which they could sell for the funds needed for their departure.
During the 5th century BCE, Kreusa and her husband worked as vegetable growers and sellers on the island of Kephallonia. However, they were not satisfied with this livelihood and therefore sought to seek other means of acquiring a fortune. They yearned to leave the island but could not afford to do so.
The couple soon heard stories of how Kephalos, the mythical founder of the island, had gifted a precious necklace to his wife Prokris, and how the necklace had then been lost in the sea. The couple identified a sunken temple off the coast to be the location. However, it had been overrun by a school of sharks, preventing their dream's fulfillment.
In 431 BCE, the couple met the misthios Kassandra, who agreed to help them recover the necklace from the ruins. Kassandra was able to eliminate the sharks, retrieve the necklace and hand it over to Kreusa. Having obtained what they wanted, Kreusa and her husband rejoiced at the prospect that they would finally be able to achieve their dreams of migrating from the island.
- The name Κρέουσα (Kreousa) means 'princess', and is derived from the word κρείων (kreíōn), which means 'lord, master, ruler'.
- She shares her name with multiple figures from Greek mythology.