Definition of “heroine” - Learner’s Dictionary

heroine

noun [ C ] uk us /ˈherəʊɪn/
MAIN CHARACTER

the main female character in a book or film, who is usually good:

the heroine of the film 'Alien'
BRAVE WOMAN

a woman who does something brave or good that people respect or admire her for

(Definition of “heroine” from the Cambridge Learner's Dictionary © Cambridge University Press)