It's funny you mention that because this morning I got to thinking about how Raziel is like Flauros. Granted the two are twins (or triplets as they have a sister named Gabriel.) Raziel is supposed to be snarky although unlike Flauros (whose snark is more of a demonic thing) Raziel's snark is caused by several millenia of what he likes to call "human ignorance"
I believe that I could definitely do that. I've wondered about having him sharing information about some of the angels and demons from his world. Along with some other facts.