User blog comment:Bennlimos/HxH Questions & Thoughts Discussion 8/@comment-5780397-20141015164354/@comment-5780397-20141015165449

3) I wrote it in the Trivia section of his page. My guess is that he was referring to Killua, because: Kalluto hates Alluka, perhaps because he is envious of the love she receives from Killua; we know Kalluto has only four other brothers, thanks to the family picture and many other sources from within the story, and he does not seem to cherish any of them as much as Killua; Killua is the only one who was not home when Kalluto departed with the Troupe; Kalluto spied on Gon, Kurapika and Leorio after they passed the gate, maybe because he wanted to see Killua's friends. In the 199* anime, he even saved Gon from Mike, and we know he is a sadist, so it cannot be he did it out of compassion.