The references to who is talking should be done through language, but if you feel more comfortable italicizing it as well I won't complain.
So long as you don't do anything weird with them, go for it.
@babbysama That was a rather evil cliff-hanger -.-
@Vilageidiotx Would it be alright if I control the Shahanshah in my next post? Not doing anything crazy. Basically, the Shah and his court are travelling to Susa for the winter (it was the winter capital of the Empire, while Ctesiphon was the summer capital). I might maybe include some interaction with the Shahanshah, but I'm not quite sure as of yet.
Also, pondering the possibility of RP'ing as a Roman of some sort alongside Karen to get in on all that action. Maybe a scholar of some sort, of even a priest/monk to get some theological perspective on the situation.