Considering the power Sakura got at the end of her series she could be a legit threat to Fieren.

Good thing it wasn't Nanoha.

BrokenEagle98 said:

Good thing it wasn't Nanoha.

Or Madoka, or Homura, or EVEN Sailor Moon

Skydragon0 said:

Or Madoka, or Homura, or EVEN Sailor Moon

or Yuuki Yuuna

I was hoping this bound to happen. Honestly if we're talking "strongest" magical girls, well the list is pretty long.

But let's not talk about the ones from Rising Project... Majority of them don't play FAIR.