This character's husband becomes suspicious of her when she tells a former 
This character's husband becomes suspicious of her when she tells a former lover "you always look so cool." When this character learns that her baby is a girl, she scornfully remarks that "the best thing a girl can be in this world" is "a beautiful little fool." This character, whose voice is identified as being "full of money," fell in love with the title character of the novel she appears in as an eighteen year old in Louisville. This character drives the gold coupe that runs over Myrtle Wilson, resulting in the murder of her lover, who is captivated by the green light at the end of her dock. For 10 points, name this character who finally refuses to leave Tom Buchanan for Jay Gatsby at the end of The Great Gatsby.
This character's husband becomes suspicious of her when she tells a former lover "you always look so cool.
{Daisy} Buchanan [or {Daisy Fay}; or {Daisy Fay}; prompt on {Buchanan} before mentioned]