From The Heretic Knowledge Vault
Barb is, to put it bluntly, a bit of a hussy. She is also a Gewehr Wraith who strikes large-economy-size sparks off her fellow Wraith, PC Layla Sorensen. The reasons for this animosity aren't totally clear, but Barb appears to be one of the Gewehr people who resent Layla's rapid rise through the ranks, and she certainly isn't shy about showing it. The two first come into conflict (at least on-stage; all indications are that they've hated each other's guts for a long time) when they are ordered to join airship pilot Ace on a reconnaissance mission to points north of the Gewehr's home grounds at Kugelheim. This mission concludes more or less successfully, albeit with some embarrassment for Barb because of her fear of heights -- not the greatest thing for someone crewing an airship to suffer from. Later, a confrontation between Layla and Barb leads to the former blasting the latter with some undisciplined magic, which becomes a teaching point when the effort of casting the inadvertent "spell" lays Layla low.
She hasn't been seen since this encounter, but she's presumably still around Kugelheim somewhere, just waiting to make Layla's life miserable again.