The correct response to the question regarding the difference between the character's background in the provided passage and that of Jane Eyre is:
This character was not accustomed to living in a large mansion; Jane Eyre was.
In the passage, the character reflects on her transition from dormitory life to living in a large mansion (Thornfield Park), indicating that she is not used to such an environment. In contrast, Jane Eyre's story begins with her experiences at Gateshead and Lowood, and she subsequently adapts to and eventually becomes familiar with Thornfield Manor.