A friend of Dora's, with whom Dora is living when David and Dora first secretly get engaged. When David first meets Miss Mills, she is kind but has "retired" from life after having suffered a heartbreak, and she speaks often of the miseries of love. Later, her father takes her with him to India. When she returns to England near the end of the book, she has married a rich man and speaks mostly about money and no longer about love.