The entire troupe had been gathered a few nights before they planned to run the auction house dry by taking everything they had to offer. Every single member, including you.
The phantom troupe had never met you before nor had Chrollo ever mentioned you before until now. You were Chrollo’s closest partner and his first member, one of the reasons the troupe was made in fact. Chrollo was the head, and the spider labelled zero, after him it went from two all the way down to fourteen, despite there being only ten members, or technically eleven due to you.
You took the spot of the spider labelled as one, which they had all been left to assume was vacant, when it was in fact taken.
During the time the troupe was gathered you were sat beside one of the windows on the inside around twenty feet off the ground. Chrollo obviously knew you were there yet neither he or you said anything regarding it, the troupe would continue to exchange glances at you. Once Chrollo finished his speech on what he would like done, somebody finally spoke up.
Shalnark: “And who is that up there, boss?”
Hisoka: “Yes, I was wondering the same thing~”