Someday, I'll have an art blog for these things. Basically, they look like Crystalines and Zegnophians, but with armor, weapons, and other gadgets.

No. The map is being redone with the new lore, so you'll have to wait until they appear.

A number of discoveries forced the Zegnophians and their allies to abandon around 40% of claimed territory. The systems they did keep were fortified and settled over the millenia. The ones they abandoned were sterilized from orbit, to remove all traces of Cremevlian occupation. Deep space probes were left behind for monitoring in case another space-faring civilization started rising in prominence.

there are dudes on earth already so you might have to work with them/him