[Childe can hear the smile in the tone of his voice, and it pisses him off. So much so that his fingernails begin to cut into the palm of his hand, though he don't notice that it's happening, keeping the same demeanor as before. He hates so much that when it comes down to it, they're both such terrible liars, and he'd argue that he's even worse than Aether is.

But to use that against them, to get Aether himself to provide the evidence needed to take him down sets a fire ablaze inside of him that's hard to control. Wanting to kill the king, threatening Childe's own life and making Aether completely miserable in the process...it's akin to threatening his own family.

He won't let them get away with this. Whoever it is that wants the king dead. Because where does it stop? There's more questions than answers.]

...Fine. [Is the answer he finally spits out, not hiding the venom or anger any longer.]

I'll agree to help, but only under one condition. The prince is left out of this. I don't want him involved in any way.