Roberta Pembroke was an Immortal of American origin. Teacher of Orville Webber and Liam Boorman
Her assigned Watcher was John L. Slocum, from 1868 to 1869. In 1869 she was beheaded by an unidentified Immortal.
Slocum was later dismissed from the Watchers with prejudice due to allegations that he had physical relations with and/or contributed to the death of this assignment.