Thix was a security guard in Prince Xizor's Palace on Coruscant. He was in charge of securing sector 1138. He was killed when Luke Skywalker and his friends walked into the subbasement in the search for Leia Organa.
Thix's name and the sector he was securing are clear references to George Lucas' movie THX-1138.
Thix's name and the sector he was securing are clear references to George Lucas' movie THX-1138.