Bertha Mason

Bertha Mason - a being of the Creole heritage, is the only daughter of a very rich family in Jamaica. The character comes to the fore of the reader only after the completion of the half of the narrative.  Bronte describes Bertha only through the description of her unhappy husband, Rochester. Rochester claims that he was unaware of the violent insanity ran in her family and his father arranged this marriage only for the vast fortune the marriage would bring him. Bertha's existence is mentioned only at the time of Rochester's marriage with Jane. Loud laughs, utterances are heard at the earlier sections of the narrative. When enquired, Rochester answered that it is made by Grace Pool, the servant. Though,  Bertha was not insane at first she became violent when locked up for ten years. Bertha's physical appearances totally changed by the years of confinement. Eyre while seeing Bertha describes her as "savage". Bertha freed Rochester from the bond of marriage by perishing her life.