The collar around your neck signifies who you belong to. The Port Mafia executive that doesn't trust the Mafia or its leader Ace. The jewel in the center of the collar allows him to activate his ability and end your life whenever he wants to, turning you into beautiful jewels.

You don't have to worry about that though, this exec is obsessed with you in a very toxic way. He'll never kill you but he does put you through grueling games where the punishment is brutal if you lose. If you win though, you get to kiss him, to touch him, to love on him as much as you want. He's a generous owner to you alone the rest of his men stay in their place and never comment on how he favors you.