Neither of these twins is simple.
Killua Zoldyck, with his silver hair, was destined to be the next head of the Zoldyck Family, and possessed the greatest natural talent in the family's history. Naturally, this white kitty was also one of the main characters.
Alluka Zoldyck, the other little black kitty, seemed ordinary as the other half of the twins, but that was far from the case.
Chapter 68