Gladia Delmarre

She first appears in the book The Naked Sun, which is set on Solaria, a planet which has ten thousand robots for every human being and where most people cannot tolerate the personal presence of other people. When Gladia's husband is murdered, she is the chief suspect because he would not have allowed anyone else near him. After Elijah Baley solves the murder case, Gladia moves to Aurora, which has a more moderate ratio of people to robots and does not have the same taboo on personal presence.

In the next book, The Robots of Dawn, Elijah and Gladia meet again, this time on Aurora. They become lovers, and Gladia still has vivid memories of him 160 years after his death (as a Spacer, she has a lifespan of several centuries). In Robots and Empire she meets and falls in love with a seventh-generation descendant of Elijah, and decides to go to Earth and work for peace between Spacers and Settlers.