Procculus
Serial Attempted Murderess
I'd say there was a tiff between the Cloudcutter and the Remorse, where their old captains had a lasting grudge against each other. Say, the Cloudcutter ex-captain had run off on a deal with the Remorse ex-captain. And to this day, the grudge stays, and none of the crews exactly enjoy each other's company because of this, especially those old enough to have been around for this grudge to arise.