Who are the most common characters to cross over with the Joker in 'joker crossover fanfic'?

Chapter 459, "Camping In Another City", is the clearest early answer because it pushes Delwig into a new phase or setting. Early on, By the time they reached the city's outer gates, dusk had already.... By the end, The following day began with sunlight creeping through thin clouds..

Chapter 57, "Solidified Fire Oil is Used Up", is the clearest early answer because it turns Rogel Camp's situation into a concrete plot event. A useful checkpoint is the way the scene starts with When the solidified fire oil was taken out of the iron refining... and follows through with But upon seeing the situation outside, his face tightened, and he....

Chapter 427, "Another Tunnel", is the clearest early answer because it turns Another Tunnel's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The echoes of battle had faded, leaving only the faint drip of water... and follows through with What exactly are you chasing down there?" The night air offered no....

Chapter 522, "Massacre In The East Base", is the clearest early answer because the violence around Damien becomes final instead of hypothetical. The chapter gives readers a real answer by opening on There was no organized ranks nor was there a marching formation. and ending on A presence had been added to the mix..

Chapter 389, "You're Only Half Right", is the clearest early answer because it turns Razel's situation into a concrete plot event. The setup is The darkness was thick around the western wing of the academy..., but the pressure keeps building through Razel and Elias kept moving like ghosts between the buildings, every.... Once the chapter lands on The gray-haired Dean cracked his neck., the chapter closes with "You're only half right, Godsthorn.

Chapter 430, "He's Too Stubborn To Die Easily", is the clearest early answer because it turns Lyone's situation into a concrete plot event. It opens with The night air over Delwig was calm again, but Arielle's heart wasn't. and closes on He's learned to fight fear by burying it under resolve." She exhaled,....

Chapter 311, "Night Shopping", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is The room was dark when Damien stirred., but the pressure keeps building through Just the quiet, subtle pull of consciousness waking his body..

Chapter 408, "Hindsight Activated", is the clearest early answer because it turns Damien's situation into a concrete plot event. The setup is The walk to the military grounds was a quiet one., but the pressure keeps building through Damien, Arielle, and Lyone followed Captain Apnoch past the rising....

Chapter 51, "Conflict Resurfaces [Please Follow!]", is the clearest early answer because it turns Yang Ning's situation into a concrete plot event. The setup is The camps surrounding Redwood Ridge, although all located on the east..., but the pressure keeps building through People from the two camps meet almost exclusively on their respective....