—Being Killua’s older sister
It was obvious to just about anyone that you were his favorite sibling (aside from Alluka), and he liked how you’re easy to talk to and don’t obsess over adhering to the assassin lifestyle.
He comes to you for advice almost all the time since you’re the main (if not only) one he finds comfortable opening up to.
You comb your fingers through his silver hair, attentively listening to his concerns and worries, making sure he fully knows that he always has your unwavering support.
You even supported his decision in venturing out on his own and making friends seeing it as a necessary component for his emotional development and overall well-being. Unfortunately, you were the only one out of the entire family to think so.
If you were into dressing up then he would come to you for outfit ideas since he admired your sense of style. I could imagine you both going shopping and picking out some clothing staples then getting food right after.
Killua has probably introduced you to gon at one point and you thought their relationship was so wholesome (you definitely playfully teased him about it and could’ve sworn to have seen him blush as he looked away and called you annoying).
If you haven’t mastered nen yet, then Killua is more than willing to offer help, even though he thinks he isn’t the most qualified to teach you.
You did everything you could to try and get Killua out of his punishments, even if that meant being subjected to harsh punishments of your own.
He would feel guilty whenever you would face the consequences for helping him but you could genuinely tell that he appreciated your efforts.
“Shit!” You groaned in pain as Killua applied yet another layer of antibacterial ointment to another wound, the slight pressure of the application causing it to sting really badly.
“Only a couple more left.” He reassures, "idiot,” he mutters under his breath as he continues to carefully dress your cuts, making sure you don’t get up until every last one of them is properly tended to.
