Three ways in which Elizabeth Bennet shows her tremendous character by standing up for herself and staying true to her ideals in the movie are the following:
1. When Jane falls sick, Elizabeth stands up to her mother and goes to visit Jane at Bingley's house. Mrs. Bennet is only focused on marrying Jane and Bingley, but Elizabeth values Jane's health much more than marriage.
2. Elizabeth stands up to Mr. Darcy when he first proposes to her. Mr. Darcy was so sure of her acceptance that he ended up offending her family, saying their behavior and situation in life were inappropriate. Elizabeth quickly makes it clear that such words are not welcome.
3. Finally, Elizabeth stands up to Lady Catherine, Mr. Darcy's aunt, when the old woman comes to defy her. Lady Catherine tries to force Elizabeth to promise that she (Elizabeth) will never marry Mr. Darcy.
Elizabeth, however, does not comply and stays true to her belief that a marriage should happen between people who love each other.
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