R. Daneel Olivaw is a fictional robot created by Isaac Asimov. The "R" initial in his name stands for "Robot," a naming convention in Asimov's future society. Daneel appears in Asimov's Robot and Foundation series, most notably in the novels The Caves of Steel, The Naked Sun, The Robots of Dawn, Robots and Empire, Prelude to Foundation, Forward the Foundation, Foundation and Earth as well as the short story "Mirror Image". He was constructed immediately prior to the age of the Settlers, and lived at least until the formation of Galaxia, thus spanning the entire history of the First Empire, the Second Empire run by the Second Foundation, and finally the group consciousnesses of Galaxia, although this last was uncertain as no book about this was ever written.
Daneel is a robot built by Roj Nemennuh Sarton and Han Fastolfe, who are Spacer roboticists from the planet Aurora, in the year 5020 AD. Although designed and built by Auroran roboticists, Daneel was constructed on Earth. He is the first humanoid, or "humaniform," robot ever constructed and is virtually indistinguishable from a human being. This "undercover" attribute enables him to help earth-policeman Elijah Baley solve crimes. Daneel and Baley first meet while Baley is investigating the murder of Daneel's co-creator Sarton in Spacetown. Daneel is physically a perfect likeness of Dr. Sarton.