Borderlands 2 : Mechromancer.... She loves ponies...

Seriously, the amount of MLP:FIM refrences in her skill tree is ASTOUNDING.

Possible References:
BFF Tree - Potent as a Pony: Pony in the name.
BFF Tree - Sharing is Caring: Stereotypical show message.
LBT Tree - Evil Enchantress: Pinkie's song in Bridle Gossip.
LBT Tree - Make it Sparkle: The character Twilight Sparkle.
OC Tree - Discord: In the "Ordered Chaos" tree with the name "Discord," may point to the show character Discord.

For sure references:
BFF Tree - 20% Cooler: Rainbow Dash's line in Art of the Dress
BFF Tree - Fancy Mathematics + Buck Up: Both abilities are next to each other reference the show's buck happy pony, Applejack.
LBT Tree - The Stare: Fluttershy's special ability.

....

4chan's going to hate the Mechromancer.