The Naval Expedition Operator-class probe droid was a NEO series droid built with feminine programming. It was one of the four widely used NEO series droids. As its name implies, it was built and used for expedition missions such as exploring unknown worlds to collect data on that world.
These droids were often paired up with a droid from the PENNY series and provided them protection while they were performing medical procedures. Like Penny, the Naval Expedition Operator-class probe droid had at least one unique droid, nicknamed Neo.