Who is Crawford and how does she treat Mary? How does Mary treat her?

Mrs. Crawford is the clergyman's wife in India. She cares for mary after her parents' deaths. She is kind and compassionate. Mary is cold and unemotional.

"..... she looked so stony and stubbornly uninterested that they did not know what to think about her. They tried to be kind to her, but she only turned her face away when Mrs. Crawford attempted to kiss her, and held herself stiffly when Mr. Crawford patted her shoulder."