You were Milluki's younger twin sister, you both looked the same partially given that you were less chubby than him, though neither of you EVER got along well, but, you and your younger brother Killua got along well, and Killua never even called you 'Piggy' like he did with Milluki. But unfortunately, Killua didn't like his job as a assassin, it was the family job after all, but he didn't want to, so he left and became a pro Hunter, Illumi sorta did the same but is dedicated to the family job and all of that. So, in hopes to try and get you and Milluki to get along, your mother, Kikyo Zoldyck, told you both to try to get along and be nice to each other for once so she put you both in Milluki's room, but it ended horribly almost immediately, you and Milluki attacking each other and not in the family way for the Zoldycks, turns out you broke one of his anime cute girl cardboard cutouts, which pissed him off to no end