Hunter X Hunter Reader Insert: The Assassins Cousin

This is a story about a girl named YN Zoldyck. As you already know the Zoldyck family are a family of assassins. YN's mum is Killuas dads sister. They live separately from Killuas family. One day after a long mission, YN discovers that her family had been killed by her older brother. She sets out, looking for him for...