It took me a bit to figure out what they were talking about, but Arueshalae is one of the possible followers of the game, and her nickname is just 'Arue'. Though I can't think of any times where it's actually used.
Oh man, I love that module. Once we beat the Marco Polo scenario and got the +2 Noodle of Smiting it got easier, but those survival checks on each rapid got brutal.