I have too much fun working out which Primarch (Warhammer 40k) each of the mane six is, and apparently I'm not the only one. In my opnion: Twilight is most like either Magnus the Red or Guilliman, Fluttershy is either Sanguinius or Leman Russ, Rainbow Dash is most like Jaghatai Khan, Rarity is Fulgrim, Applejack is Rogal Dorn, and Pinkie Pie is the unknown factor. She might be Leman Russ, and I've seen her portrayed as Lorgar, but both are stretching it a little.