Night of the Humans
Doctor Heeva was a Sittuun member of the Beagle XXI expedition to the Gyre in 250,339. Like many of the Sittuun, Heeva received her Arabic name from the Syrians who first discovered their homeworld in the Battani-045 system.
When the Beagle XXI crew launched a mission to destroy the Gyre to avoid the resulting devastation its impact with the comet Schuler-Khan would have on their system, the crew began being picked off by the native humans and Sollogs. Heeva was one of only four survivors alongside Captain Jamal al-Jehedeh, Charlie and Ahmed. (Night of the Humans)