As the person who was behind the idea, I wish to explain:

I was planning to create a series of MLP vlogs, where each time, I'd pick my favorite pony from the episodes that I watched (unless that Pony was picked earlier), and would then request Zoarvek to draw that character as a specific Servant Class. I do realize that this is an odd idea, since those are neutral figures, not present in the story. But to me, those images on the cards were always so interesting, so I felt it'd be funny to draw the Mane 6 as them.



Hmm what was the setup....

Caster - Twilight Sparkle (cause magic)

Rider - Rainbow Dash (kind of obvious reasoning)

Assassin - Rarity (she just seemed most fitting... even if she likes to represent herself, I felt like she could easily conceal herself with an outfit, if she so desired)

Berserker - Pinkie Pie (cause madness)

Lancer - Spike (cause... my favorite class, for my favorite character... would be a later reveal)



And that left me with Archer&Saber, as well as Applejack and Fluttershy. Both seemed equally legit picks, but given how Archer has the "Independent Action" ability, I felt like Applejack would be the better pick for that... soooo Fluttershy is Saber!