The Voice

The voice is first encountered after a mission given by 400 to acquire documents secretly. The voice questions the decision of the volunteer to casually hand the documents over to 400 and also points out his abnormal behavior. While the volunteer is more concerned with the voice that is apparently in his head, the voice also shows the ability to alter the world around him. While the volunteer believes he either inhaled something while in the facility, he later finds out that the voice spoke with 400 as well, telling him what the documents held was true. The voice also spoke to a friend of the trader at Oasis, who you are sent to speak to in order to find out more.

The voice comes back on last time after the mission to reveal the truth. He calls the volunteer naive, and claims there is more to this then he knows, before going away once more. This is currently the last time the voice speaks to the volunteer. His current status or even location if possible is unknown.

Trivia:

One theory is the voice is the scientist you play as in the prologue, having somehow become a anomaly himself. Though what kind of anomaly is up for debate if he can either have a effect on a persons perception of their world or if he can effect the world of the island itself is unclear.