slams into here rull quick:

re: tris - no fourth walling to be had really, though he'll think gwen is just being weird if she says he's Just A Character? he does know harry potter and the like so feel free to chat abt that with him tho?

re: percy - she's free to mention dnd, just no directly fourth walling him by telling him he's fictional bc he'll probably not take that over very well. but please. yes. tell him about dungeons and dragons.........