"I don't know— you shouldn't be! Uncle just arrived recently, and when I told Azula, she accused me of wanting to abandon her for him, and I—" He grumbles, leaning forward a little to hang his head in his hands in some obviously pent up frustration.

"I don't wanna have to pick sides. We're all in this together now. I don't think she's gonna hurt anyone... But if she does, then I'll want to stop her, too. Just— without hurting her. But I don't think anything will happen. She doesn't have any motivation here — there's no reason to fight. She accepts that."

That's about as close to an 'alliance' as he's managed to get her to agree to.