Mrs. Rochester is Bertha Mason, the "madwoman in the attic" who tried to burn Rochester to death in his bed, stabbed and bit her own brother (Richard Mason), and who’s been doing other creepy things at night. Rochester was tricked into marrying Bertha fifteen years ago in Jamaica by his father, who wanted him to marry for money and didn't tell him that insanity ran in Bertha’s family. Rochester tried to live with Bertha as husband and wife, but she was too horrible, so he locked her up at Thornfield with a nursemaid, Grace Poole.