Experiment XC-76SD4, later known as Cassie.
Zetan (Grey) - Human hybrid created by Zetan scientists.
Age - 13 ( human equivalent)
Created using a mix of Zetan and Human genetic materials, Cassie is one of a batch of such hybrids, created to test the possibility of Zetan colonisation of a wider variety of worlds, due to limitations in Zetan biological tolerance of especially warm environments and bright light, given their origin on the night side of a tidally locked planet.
The XC-76 series of laboratory created hybrids varies from mostly human with some Zetan features, to mostly Zetan with some human features. The hybrids are artificially aged to skip childhood, however the more human ones are less compatible with accelerated aging and need to be aged removed from maturation tanks early.
Cassie and hybrids like her are routinely sent to prospecting worlds and invasion targets to test livability and biological compatibility for later Zetan occupation. They are brainwashed for loyalty, however are treated poorly by the Zetan society and considered as property.