Once three requests are fulfilled, Alluka's appearance shifts (becoming "Nanika"), and she will grant almost any wish, regardless of its scale.
Desperate to heal Gon after his near-fatal battle with Pitou, Killua returns to the Zoldyck estate to enlist Alluka's help. 138 : Request x and x Wish
Alluka makes three "requests" (or "favors") of a person. These can range from innocent acts, like asking for a hug, to horrifying demands, like asking for internal organs. These can range from innocent acts, like asking
The "cost" of a wish is not paid by the wisher, but by the next person who encounters Alluka. The greater the previous wish, the more difficult the subsequent requests become. If four requests are denied in a row, the person and their loved ones die—sometimes numbering in the dozens. Key Narrative Developments If four requests are denied in a row,
Silva and Illumi Zoldyck view Alluka as an "it"—a dangerous tool that must be contained due to the risk her powers pose to the family.