As a major character in "Brave New World," Lenina Crowne, a beautiful Beta, appears throughout the novel. 

• In Chapter I Lenina is introduced as the nurse in the hatchery,
• In Chapter III Lenina talks with Fanny about her desire to go with one man, a desire that is considered dirty in the New World.  She dates Bernard Marx, who is different from his Alpha-Plus caste as he is smaller than others and hairy.  His desire to be alone is considered odd. 
• In Chapter IV Lenina and her date, Henry Foster fly in his helicopter to play Obstacle Golf. 
• In Chapter V Lenina and Henry take soma before flying to a nightclub. 
• In Chapter VI Lenina travels with Bernard to the Savage Reservation.
• In Chapter VII, Lenina meets John the Savage and is taken by him.
• In Chapter IX, however, she retreats into a soma holiday. 
• In Chapter XI, Lenina returns to the New World and takes the Savage out in public
• In Chapter XII, Lenina attends a reception for John, but he does not appear. 
• In Chapter XIII, Lenina turns down Henry Foster and pays a surprise visit to John.  After the Savage's rejection of Linda, she does not appear until the end of the novel.

Hope this helps!