Unknown Secrets (reader x Hisoka)

This story is about Illumi's twin named y/n Zoldyck, Illumi any you were inseparable and extremely close until one knight when there was a break in at the Zoldycks old estate and many things were stolen along with you and your baby sister at the time named Kallumi. They put you through hell and back when you were kidnapped but Milluki soon found you on the dark web. Sad to say it ur baby sister had died from all the torture they put you through, it was worse than at home. soon after this you begged to take the hunter exam and your parents let you. but what they didn't know was that an old childhood friend of yours was there too, also you feared to tell them what the black diamond choker you were wearing was for. did it mean something? and is there something more in the family dynamic and relationship?