I had in Caed Nua this Dunyrd Psion as a guard (traveller seeking for employment, I hired him).
I've updated the game to 2.0 and installed white march part one. Now I see the psion in my throne room and the castle still counts 8/8 guards hired, but I don't have any Dunyrd Psion line in the Hireling list anymore and I can't fire him nor hire someone else in his stead.