During Nero's first introductory scene (during the envoy quest) he mentioned "Codename Hummingway", killed a guy, and it was never heard of again. What was this about? Was it an Ala Mhigan resistance group? Was it some guy that was trying to overthrow Gaius? There was no buildup to this scene, and no further mention of it. I was hoping that this would be mentioned again in 4.x with the liberation of Ala Mhigo or something, but it was not brought up again.
Did this line solely exist to show that Nero would kill someone without much remorse? It was just such an odd character buildup to never mention or follow up with again. I don't know, this had always been a loose end to me that I wish had been more elaborated on.