Nanika is commonly thought to be Ai, one of the Five Threats humanity brought back from the Dark Continent. At some point, it possessed Alluka Zoldyck's body and began sharing an empathetic link ...

She is undoubtedly one of the best sisters in anime. Alluka Zoldyck is a sister who defies the cruelty of her family by being loving and trusting toward Killua. Despite being isolated and treated ...