Nanika (ナニカ, Nanika—lit. "Something") is a mysterious Dark Continent creature who came to possess Alluka Zoldyck under unknown circumstances. The two currently coexist inside Alluka's body. Nanika's real appearance is unknown. When it manifests itself, it tinges Alluka's sclerae, irises, and mouth pitch black, also causing the latter to appear larger. Like Alluka, Nanika is …