Book Chani vs movie Chani.

Tbf in the books she isn't a helpless individual- she kills a challenger to Paul and is one of the Fremen's best fighters- but I do like how Denis added more agency to her character.

Fully fleshed out female characters emerge in the final two books HoD and CD- and even become the central protagonists- but Dune did suffer from some of the general habits of sci-fi authors in regards to female characters.