I also got the suspicious Ilberd vibe. Also for some reason, I thought Nabriales looked like one of the new Crystal Braves people you personally recruited. I thought it was the dude that was involved in bad shindigs at Buscarron's Druthers during the early main quest (I forgot his name, but those sideburns looked familiar) but I've been suspecting a whole bunch of Crystal Braves people to be traitors even before the 2.5 trailer came out. I got my eye on all of them.