BurningCold is right. I'll say that Astera certainly has ambitions to be a contender for empress, but that's a long way coming still. It's definitely an option for later in the story though, I think, especially depending on how her personal story arc develops. Knowing this, she's more than open towards political discourse with whomever to keep the peace or even find allies to support her, so an ambassador would be very welcome for instance. I'd look forward to it.