Right so Alluka and Nanika are separate entities but they have a great relationship and care about each other, and both see Killua as their older brother. What if Alluka grew up and was a sensible adult. Would Nanika also grow up, or would she remain mentally a child, and would Alluka gain authority over Nanika the way Killua has it? In that case would the consequences even apply or would an adult Alluka essentially be a god with infinite wishes? Could Alluka even make requests from Nanika at all? And assuming that she can, why wouldn't Nanika just give her everything for free? The restrictions seem more like they are intentionally made by Nanika rather than any sort of limitation of her ability.
Soooo assuming Alluka grows up and can think more logically and sensibly is she essentially a god now able to do whatever she wants? Since no rules apply to Killua, by that logic no rules should apply to Alluka or anyone else she truly bonds with like with Killua.
Or do you guys think Alluka would still need to pay and that using the powers always has a cost but Killua is exempt because its only being pushed towards the next one in line?
It's a bit of a confusing and inconsistent power that doesn't seem to be a Hatsu at all, so i have no idea if there are actually any real rules to it. Because with a stable mind Alluka would be unstoppable.