Werrol Folson is a character intended to be mentioned in Dead Island. He was in Los Angeles during the zombie outbreak on Banoi island. He is the friend of Adna, however both her and him were cut from the final game.
Not much is known about Werrol, other than that he was a friend of Adna and would have been mentioned by her during her quest, if she was supposed to have one. He would not have made a physical appearance in the game, as he was in the U.S when the outbreak happened on Banoi.