•She was once... mine•
Y/N L/N also known as WildCard was once the Joker's favorite partner to have before he had met Harley in Arkham. Both of them was also known as the King and Queens in Gotham, nothing can stop them from their doings even Batman.
She wasn't just a partner to him, even on how much cold blooded murderer the Joker was. He treated her as his Queen, he loves her more than anything... more than himself and Y/N fell in love with him as well, as the time goes by.
Until one day, WildCard was captured and suddenly disappeared... accidentally. This was a very bad news for him, he had lost his partner... his lover... and his other half.
Few years has passed, the Joker changed. He have met Harleen Frances Quinzel who is now Harley Quinn. The King and new Queen of Gotham. The Joker was still devastated for his past partner, which leads him to remember at certain times and causes him to let out his anger to other people or even Harley.
The thing that Joker believes was... Y/N is dead.
But... is she really dead?
No, but the Joker doesn't have a clue about it and then one day. He accidentally found her.