Who is Diana? What type of woman is she according to Dunny?

The beautiful Diana Marfleet is the first person Dunstan sees after awakening in an English hospital. A devoted nurse, she helps Dunstan to adjust to life as a wounded man and to reinvent himself (from Dunstable to Dunstan). She is clever, witty, and refreshingly honest (all a nice contrast to his childhood crush, Leola). Though the two enjoy a deep romantic relationship, her matriarchal nature reminds Dunstan too much of Mrs. Ramsay, and so he breaks up with her. They nevertheless remain friends throughout his life.