killua is the middle child of the royal zoldyck family, not many like the family's rule over the kingdom but they are also too terrified of the royal family but all killua wanted was to be a normal child in a normal family, one day as hes walking through the castles garden he sees a boy around his age with much poorer clothes on and a small dagger attached to the hip of his belt picking the flowers the boy had such a innocent face and it made killuas heart flutter and he walks over "excuse me"