Schezo Wegey, Arle Nadja's rival, aspiring Dark Mage, pawn of the undead Runelord. An idea in the Mesmeric Multiverse was that Arle helps him realize he's Runelord's puppet, and since I wrote it that Sora winds up in their world, I guess he could help her help him, since he's familiar with weirdos possessing people's Hearts.

   I thought of some ideas of Schezo realizing something is wrong with him. One idea was Kikimora seeing an unclean spot on his Heart and going psychotic, trying to kill him to clean it off. Another idea was that he goes after a Demon Princess for her power, but backs off once he realizes that the princess, Salome, is an infant, but then Runelord takes over and makes him try to attack her anyway. The third idea leans more towards dark humor and involves a contentious franchise for the sake of one joke I thought was mildly amusing. Long story short, Schezo would've been driven after some alien prince's hybrid kids, incurring the prince's wrath, leaving Schezo to try and figure out why he did all that, while the alien prince in question is hunting him. Also the prince is a God of Destruction.

Schezo: Okay, I can deal with this. I'll make this man stop riding my tail, and then I'll get to the bottom of this! (Opens the door)

Vegeta: I have obtained a new form, SUPER SAIYAN SHOTGUN!

Schezo: AAAAAA-

  The worst part is I thought of lore behind that shotgun...

  Regardless, the final fate would be that Schezo is freed from Runelord's control (and likely takes vengeance on him as a result). I imagine then Schezo would go from his white sheet Madou look to his Puyo Puyo look, or something similar to it, as shown above. Also his hair is a bit longer. Also he has a tiny elephant named Tenori Zoh because yes.

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All characters belong to their respective owners/creators.

Madou Monogatari and Puyo Puyo(c)Sega, Compile