Yes and No, there really isn't a singular female lead character at all. ( its a harem manga, believe it or not )
That said, she IS an important character in the story, and as you can see is being manipulated atm.
She is honestly one of the better characters in the story, but she starts off looking like a naive fool because of circumstances.
She should get a lot better and stops acting as stupid after this arc, she isn't a lost cause by any means and you might come to like her later on.