These gems are scientists sent to other planets in order to study the terrain. They aren’t valued by Homeworld’s society even though they contribute to the gem civilization’s expansion. Most Dravite gems are humble and value empirical data more than assumptions. This particular Dravite used to work on Mars but was withdrawn after the war against Earth. She is very quiet and does not understand sarcasm.
[suggested by @the-simple-diamond-bunny ]