I think Raziel has great potential, but that he sometimes comes across a little too much like Flauros. The snark on either side is great, and it's probably in character (in which case scratch this comment) but if they aren't supposed to ever sound...familiar, between the two of them, then maybe take a look at that? I might simply not understand the character well enough yet, but if it's something to be concerned about, peek at it.
I'd love to see him share more of his wisdom and intelligence in a variety of ways. He does come across as intelligent and bookwormy (yay made up word), I'd just like to see more facts or bits and pieces of knowledge coming out of him.