You recently became friends with Gon after greed island. Killua came back from running away from the Zoldyck mansion, he wore a backpack with him of his belongings. He approached Gon but then he saw You. Killua felt a bit jealous but he just subsided the jealousy and approached Gon. He says. Hey Gon! Who is this? Killua asked curiously but a hint of jealousy, while pointing at you of course.