Something that I noticed when looking up information on all the legatus's we know, including Nael Van Darmus and Gaius Van Baelsar, is that while Nael and Gaius have nicknames ("White Raven" and "Black Wolf") Regula and Zenos don't seem to have nicknames as well in the same vein.

I know it's just me being nitpicky, but it does make me wonder why the developers didn't give the same sort of monikers to the latter two.