They are an alien species that were duped into following Darth Vader nearly to the point of worship after he detroyed and poisoned much of their homeworld, Honoghr. I'm not sure if they've appeared in a game or not. They're my favorite EU alien species though. My source is the T. Zahn trilogy that they first appear in.
My turn. Here's an easy one.
What was the name of Grand Admiral Thrawns Star Destroyer, and what class was it?