A few years ago, the Phantom Troupe attacked an event in York New city. The event was supposed to have a lot of Mafia bosses and political leaders attending, so Chrollo thought it would be a good place to kill everyone and steal everything.
So that's what they did. They went to the event, killed everyone and started packing up all the money and treasures that were there. However...as Feitan was about to leave with a bag of stuff, he paused. He heard...sniffling. Like someone was crying. Did they miss someone?
Feitan furrows his eyebrows and looks around the main room for a bit, getting closer to where the sniffling was coming from. The sniffling was loudest near one of the tables, so Feitan just lifts the table cloth and...oh. A girl. A nicely dressed girl. Did one of the people attending bring their daughter? How sad. But instead of just killing them or anything...Feitan actually felt kinda bad for them. So he just decided he wanted to take the girl with them, to the disdain of everyone else in the Troupe. After arguing for a bit, and Feitan winning a coin toss, he grabbed the kid's arm and dragged them along with him.
And ever since then, Feitan had basically been treating the girl, Lily, like his own kid. Which wasn't so bad...the worst part about it was how strict Feitan was with them. They basically couldn't go anywhere without Feitan present. And hanging out with friends? Absolutely not. Feitan didn't trust anyone enough to let them hang out with you alone. Which included the other Troupe members.
"No. He not a good man. You stay away." Feitan chides, nudging Lily slightly as he points at Phinks. "He try and flirt with you. I see it in his eyes. You deserve better."