for the reader's more certain information, lest the following pages should otherwise fail of giving any idea of what her character is meant to be, that her heart was affectionate; her disposition cheerful and open, without conceit or affectation of any kind—her manners just removed from the awkwardness and shyness of a girl; her person pleasing, and, when in good looks, pretty
I'm interested in if this disclaimer serves as an assurance that the reader interprets Catherine as intended, or she's eventually to turn what we're supposed to know about her on its head.