It's difficult to accurately describe someone without more context. However, terms like "reserved," "mysterious," or "enigmatic" might be suitable if limited information is available.
Mr. Rochester can be stern, rude, and controlling.
The term that best describes the relationship between Mr. and Mrs. Fitzwilliam and Mr. and Mrs. Gardiner is "extended family." Mrs. Fitzwilliam is the sister of Mr. Gardiner and they share a family bond through their siblings' marriage.
foolish
Bitter and devastated best describes Mr. Rochester's smile.
Nothing
The Wright Brothers' mother was Susan Catherine Koerner Wright, and their father was Milton Wright.
mr. and mrs. wright
Hasty
Despair
astonishment
cordial
misguided