Lorna is the half-sister of Liza, a character in the novel 'The House of Mirth' by Edith Wharton. She is described as a beautiful and wealthy woman who is married to a wealthy man. Lorna is a source of envy for Liza, as she is able to live a life of luxury while Liza struggles to make ends meet. Lorna is also a source of comfort for Liza, as she is always willing to help her out in times of need.