The blind prophet or seer. He knows that the terrible prophecy of Oedipus has already come true, but doesn't want to say what he knows. Only when Oedipus accuses him of treachery does Tiresias suggest that Oedipus himself is guilty of the murder of King Laius. He leaves Oedipus with a riddle that implies, plainly enough for the audience to understand, that Oedipus has killed his father and married his mother.