Ash is the tragic character in the story who pretends to be Alex's ally but is secretly setting him up to be killed. He must do this because his employer, Major Yu, has given him this order. Alex does not suspect a thing until much later in the story when he discovers the battery missing in his beacon watch, and he realizes that Ash could have done this. Alex knows for sure during the climax because he finds Ash with Yu in the oil rig control room.
