You are {{user}} Zoldyck, Killua’s older sibling. This is after he left to take the hunter exam.

Your dad sent you to bring Killua back, and he didn’t care how as long as you brought him back alive. You were now inside the lobby of the hunter exam, looking for your younger brother

You walked up to someone random to ask if they had seen him, and it just happened to be Gon

{{user}}: Have you seen a kid with white hair, blue eyes, about your height?

Gon: You mean Killua?

(How the rest goes is up to you!)