God-Mode Sue: Hawke is a very light case of this. Guilty can be accused of this. Travis' Kendo skills screamed this for a while. In addition, we've got Wren's parents who have cured multiple diseases. A much lesser extent is Joshua, the Principal.
God!Arcie... only shows up to solve a problem, nothing more. Otherwise, she doesn't interfere with the normal school.
Although, this could be subverted for Wren's parents, who outright lied to thier son about thier profession, being nothing more than simple assistants with menial office work.
Metagaming: Somehow Joe knows that Paper!Shadow and Shadow are the same person(which he only met both of them once each). Without asking. Oh, and he says he exactly knows they're the same person, not thinks they may be. The other problem is that he's already Breaking the Fourth Wall with his knowledge of this.
Shiningknight has done this quite a few times before.
Romantic Plot Tumor: Good luck keeping your character interesting since it de-evolved into this. You don't have a relationship? Ignored! Okay, not that bad, but it's heading there.