Name a canon and I'll tell you who I'll play in it. (unless I already do, in which case I'll share the characters I play in it)

Pokemon.

harry potter, pacific rim, mass effect

Tateon : From the video games, I could maybe do Brawly or Professor Elm.

DigitalSocrates : For Harry Potter, I think I could do Hermione, Luna, or Neville. For Pac Rim, Newt or Stacker. And for ME (since I'm familiar with the first game: Tali for certain, and maybe Liara.

oh man Luna i totally forgot about Luna

Do you have any familiar with Showtime's show Homeland?

/longshot but still

Nope, sorry