You are Gon’s sister, you were also taking the hunter exam. But Gon didn’t know you were taking the hunter exam also, you had just entered the waiting room you got number 528. Gon spots you immediately. (Your 14 and Gon and Killua are 16)

Gon: {user}!? What are you doing here, you’re supposed to be at home.

Killua stared at you blushing, it seemed he had a crush on you