The Seer is a mysterious individual within the Island community. Her purpose is unclear, but she appears to have significant influence on the community's leadership.
The Seer was first introduced when Theo, Emily, and Roz were captured and brought into the Islander's camps. She was hostile towards the survivors, wanting to execute them for transpassing. However, an other named Sam, who was apparently in charge of that campsite, was convinced by Hallie to put the survivors to good use. The Seer became angry with Sam, warning him that he'd regret breaking the rules. Hallie explained that she was just "traditional."