I am directing Pride and Prejudice and Kitty said she is having a really hard time developing her character. Any thoughts?

Key to capturing the character of Kitty is to identify how
she begins to differ from her sister, Lydia, who is definitely the leader of Kitty,
after Lydia returns married. Let us remember that at the end of the novel, Kitty is
"civilised" if that is the right word by the good influence of her two eldest sisters. I
personally think that the audience in a stage version of this excellent novel should be
able to see this process beginning when Kitty is separated from Lydia due to her
marriage. Of course, there will be tears and anger from Kitty at the way that Lydia has
married and gained a higher social status because of that, but actually being separated
from Lydia allows her to develop her own character and to escape the bad influence of
Lydia. I would suggest that the person playing Kitty thinks about modelling herself more
on Jane after this stage, as this is the beginning of her process of maturing as a
character.