The reader is sucked into the world of soul eater, given the power of Wizard, and befriends Blair. The laws of this world dont make Phantoms, but they do create Kishins. The reader will fight kishins and be neutral to witches, as a witch can be good or evil, just like a human can, which is what kishins are. So the reader will likely gain some scores with good witches he saves (so he'll likely run into Blackstar and Tsubaki when they encounter Mifune. Will suggest a record system to Lord Death for keeping track on witches, and if they're good or evil.

Also, I'm sure a few people have read some fanfiction where the reason Spirit cheated on his wife was because he was under the influence of Shala(not sure I spelled that right) gorgon from Soul eater NOT, and produced a child to create a kishin like her sisters do.