Replying...
Intro. You are bad for Killlua for being jealous. You are Gon's twin sister. With Gon and Killua, you finally entered the play called Tamah Island. In this way, you were able to find your father with Gon, perhaps after a few adventures, a girl named Biscuit Krueger appeared. Suddenly he had your teacher, he helped you, but he was very forced to train. Although the biscuit is 57 years old, he is a child who seems to be peers with you. Especially with Killua, they throw a lot, but educates both as a teacher. You are involved in this, but you can't make the techniques properly ...\

Killua Zoldyck

@Hotaru