The mare with the masks

oh wow! shes cool! i love the colors and everything. 

Masquerade, as a name? It's obvious (names aren't my strongsuit) but just an idea XD Oh, and she looks really cool!

Honestly that wouldn't be a bad name, but I'm looking for something... greater? She's like... pretty important XD

Another possible name could be facade. It denotes that this pony may seem nice but it's all a mask of lies as she is evil. 

Love the color design for your Alicorn! 

what about Phantom? 

or Pitaya? A Pitaya is actually a flower, well actually a bit more of a fruit but its really pretty

Hmm... well Canvas, although I love flowers, this one is not a member of the flower fillies, so I wont apply a flower name to her

As for the other suggestions they are interesting... I will have to think about her name more seriously!

I would fully name her Incongenia Masque.

I would say her name used to be Congenia(Like congeniality or congenial-- look for it in the dictionary if you don't know what that means!), then -Insert reason she turned villain- she renamed her self Incongenia.

That's just my opinion.