Alluka Zoldyck  

, アルカ＝ゾルディック

The Zoldyck Family's second youngest child, Alluka, possesses an extraordinary ability that allows them to grant wishes while also causing widespread destruction. Due to this highly unusual talent, Alluka has been kept in a secure vault at home, protected by four 10-digit security doors. At just 11 years old, Alluka is referred to as female by Killua but male by other family members.