Kaitou Joker X OC

Emily a was happy and cheerful girl she lived with her parents in a mansion. One day her parents told her that they're going to visit a friend. They went to the jones mansion she met the jones family she was hiding behind her father's leg then a boy cme up to her. He offered her to take his hand and asked her if she wanted to play with him. Emily smiled and took his hand and they went to play since that day they became friends. One night emily woke up she called for perants but they didn't come so went to search for them she went to the living room and saw something that will give her nightmares to the end of her life she saw her perants dead, blood everywher. She then saw a man that looked like joker. The man saw her and went to attack her then a woman stopped him. She took emily and disapeared but before she disapear she said something her voice ful of hatred clover you'll pay I'll make sure of that with that she disapeared with little emily in her arms. Since that day no one heard about emily not even jack but jack promised himself that he'll find her no matter what.
Will jack be able to keep his promise?

Will he see her ever again?

No one know.

(I only own the ocs)