Who's one character you wishwould have been developed more?

I personally think Octavian should have been given more time so we could see more about who he was and why he acted the way he did.

I mean all we get is that he thinks he knows best and that the Greeks need to die...that's about it. That little egomaniac needs more! I can't hate someone that I don't know all the way!

So who do you think should have gotten more story and characterization?