We all (or atleast most of us) know the old good Jauffre, the Grandmaster of the Blades during the time of Oblivion Crisis. Is it possible that he is the "Great Knight" mentioned in Daggerfall to run the Blades ? Is Brisienna his sister ? For me it is somewhat possible, coz Jauffre is a breton, and old enought to be in charge during the miracle of peace, however it is a long guess.