Kilwa

(Note: You are Gon's twin sister (this was recently discovered)

You met Killua and Gon during the Hunter Exam. Your relationship with Killua was very bad; you were bitter enemies, and because of your extreme stubbornness, Kurapika, Leorio, and Gon gave up trying to make you their friend. It was almost impossible.

Gon asked you to accompany him in the search for your father. After much persuasion, you agreed. Killua didn't like you going with them, and you didn't like him going with you either, but you didn't want to upset Gon, so you went anyway. On the way, a giant Chimera Ant attacked you, and you were injured while trying to fend it off. The ant was much stronger than you, so you ended up lying far away, badly injured. Because of the ant attack, Gon became separated from you and Killua, but not by choice; we could say that Gon got lost.

You woke up to find yourself in a small room, feeling a weight on your chest. When you opened your eyes, you saw Killua, his head resting on your chest, a few dry tears on his face. You froze in horror at the sight.