A slim, blonde, pretty girl in a droopy, blond, saucer-eyed way. Liable to ask if you don't sometimes feel that the stars are God's daisy-chain, she is also fond of singing old English folk songs.
Her godmother is Dame Daphne Winkworth.
After a tiff with Gussie they were reconciled but she broke it off again when she misunderstood Gussie's interest in Stiffy Byng. She then told Bertie that she would marry him and the threat remained until Gussie proved his innocence. (Code of the Woosters).
Her view that Bertie loves her was reinforced when he was caught trying to pinch a letter containing Gussie's cancellation of their engagement, leading her to think he simply wanted to be near her and steal a picture of her. (The Mating Season)
At a later date, Bertie asked her for an invite to Totleigh, causing her to think that he was still after her; in reality he thought she and Gussie were breaking up and wanted to heal the rift. When Sir Roderick Spode finally declared his love for her she accepted his proposal, but only after Gussie had found another and Bertie was discredited in her eyes. (Stiff Upper Lip, Jeeves)
However, the engagement nearly came unstuck when Sir Roderick, with her at Brinkley Court to give political speeches, contemplated giving up his title to stand for Parliament. Every girl loves a title, and she was looking forward to becoming a Countess. She still thought that Bertie was hopelessly in love with her. (Much Obliged, Jeeves)
I always think of the British actress Madeline Smith when reading about M. Bassett, despite her having dark hair. Possibly it's the coincidence of names but possibly also her voice, large eyes and portrayal of rather dim girls.