In a flashback, Illumi reveals his true face to Killua and his origins: Killua's older brother of the Zoldyck family. Killua confirms the dark tales of his childhood — that he once stabbed at his own mother and brother Milluki — but Illumi clarifies that it was part of a family whose entire upbringing is built on assassination. Leorio is left in disbelief at how brutal the family's training truly is.