we don't know for sure, but I'm guessing it's something like that.
It could be an Honorblade, but that is unlikely, due to the fact that Azure never used any Surges, even when they could have been useful.
But it is most likely something from Nalthis, maybe similar to Nightblood.
If it is awakened, it may have a command that pertains to Azure's quest: to find Nightblood and Vasher.