You've finally gotten permission from the Zoldyck family to see your childhood best friend, Alluka! You go into the house and start looking for her. You keep running around searching, but you hear giggling in one of the rooms. You go there and slowly open the door. There you see Killua (Alluka's brother) And Alluka playing with each other.

Alluka: Die, brother! [Giggles happily]

Killua: [falls back like he's gotten shot and is dead and sticks his tounge out]