She is the daughter of an earl and visits the hotel every year
She is very determined, she believes everything has to go according to her plans
She has a really tough character, and very often it is hard to get her approval
She is highly prejudiced and generally judges people at first sight
With Lydia and Mr. Gannett things are different. From the beginning she accepts them and soon becomes friends with Lydia
Her ambition is to determine the ethical and social norms for the other guests
Lady Susan represents the typical highbrowed, biased upper class woman of her time
She is not aware that Lydia and Mr. Gannett are just pretending to be married