>>3767229Killua is more passive in social situations but he can still be assertive at times, and he's way more physically aggressive towards Gon than vice versa. Something I noticed during Gon's fight with Genthru is that he says he doesn't like the idea of being manhandled, but he seems totally fine with Killua manhandling him, though I guess the context is different. As you mentioned he's taller than Gon but he's also way stronger and more muscular.
Also Gon kinda dresses like an uke. I mean, short shorts and a crop top jacket? He's practically asking for it