[Killua feels a little taken aback by the reddening of Blue's face, only because it changes the context of his question.]

Well, uh... Like I said, I never had—a friend I always knew, just... family.

[Killua curls a finger in front of his pensive scowl.]

I...I might be the wrong person to ask, about that...

[and then, late, it's like it dawns on him.]

Man. None of us are really a good measure for that, I guess...

[meaning, of course, including Gon. Killua's eyes widen, his posture jumping a little bit.]

Wait, you would know better than me! What... what do you think?