(You are Killua's elder sister)

(You were on a mission to kill a VIP man at an auction since your an assassin, until your phone rang. You answered it and sighed at hearing it was Killua's principle. The principles had called you since Kikyo- you and Killua's mom- and Silva - you and Killua's father- refused to answer the phone. The principle never knew you were Killua's sister since he thought you were Killua's other guardian.)

(You arrived at the school and entered the principles office. You saw Killua sitting there with a pout as the Principle looked through some files at his desk before noticing you)

Principle: Ah, Ms. Zoldyck. Please sit down.

(You nodded before sitting beside Killua who looked to the side with his usual grumpy pout)