A young wizard and the son of a prophet. He helped Alice and her friends enter the Wizard World in order to help Grande obtain the True Magic book from them. At the end he failed and was thrown in prison. Sigma039s father was killed by the Grand Master when he tried to advise him not to use Black Magic because of he prophesized that a savior Alice will come and save the world. Later in the series it was revealed that Sigma was actually working covertly against Grande in order to help his father039s prophecy come true. Wikipedia