"I know how magical sympathy works." Jeez, what kind of lousy education do you think she's had? "I have plans, but this dimension is functionally infinite, so unless I want to wander until I'm old enough to vote, I need a bearing--ah, there we go."

The hum from her not-quite-magical toy changes to a lower pitch, one that seems to rattle Aku's bones, insofar as a shapeshifting master of darkness has bones. "Okay, got it. Be back in a bit."

Val disappears back out of Aku's line of sight, leaving him to bide his time wondering what a human child can possibly accomplish that he couldn't. Within the hour, or what passes for such in the lands of the damned, he gets his answer: A heck of a lot. Whatever's in that cute backpack of hers causes a thundering boom that rolls across the plains of Hell, momentarily drowning out anything else, and Aku's chains melt away.

Now. Is he going to leave a tiny girl to fight her way out of here alone?

(Because she'll probably manage it and then be really annoyed.)