[Killua's not wrong to listen to his gut. Idiot #2 has officially entered the arena...!]

Ah. That explains that. [At least Hisoka isn't just hunting kids down in the street. Probably.] What's this hunter thing all about, anyway? It's first I've heard about anything like that.

[Finally, some of the concern bleeds out of his voice, only to be replaced with simple curiosity. He's still worried, but he plans on dealing with it later in his own way.]