[Killua just smiles at that, taking the knife back up again to spin between his fingers.]

Yeah, but that's just Gon. He doesn't listen to anyone. [Which means he really just wants the nagging to be amused by, but details. He stops spinning the knife there and changes to a simple wobble back and forth, watching it intently.]

Don't take it personally. He does the same thing with me, too. [Aaaand he sets it back down.] But you don't have to worry, we've got each other's backs.