okay so I want to do a fiction where I will need 6 ponies that have discord's personality in corresponding with an element of harmony
Let me give you an example i.e. the one I have thought up already

Name: Vanished Star
Gender: Male
Species: Unicorn
Corresponding element: Magic
Personality: Basically he is Discord's magic cross with Twilight's personality/magic.
He is out of touch a bit with reality, slightly aloof and cold would be good ways to describe him. Spends all his time in an abandoned book shop in Canterlot reading up on his special magic which is reality warping. slightly crazy (in a discord crazy kind of way not like pinkie pie crazy)

Another which i don't have so much well mapped out is

Name: Moonlit Escapade
Gender: Female
Species: Earth pony
Corresponding element: Honesty
Personality: I guess discord's warped morals cross with Applejack's honesty and sense of honour
Down to earth, highly successful thief. Has a deep sense of honour and standards. Has

Now Vanished Star I would like to keep Moonlit escapade could be replaced if someone comes up with a better idea

here, I'll just make something up for you, take from it what you will.
dementia
female
pegasus
self presevation (fluttershy's opposite)
sociopathic tendencies, strong will to defend herself from enemies, real and percieved. possible schizophrenia.
I dunno maybe it will spark an idea for you.
good luck! :)

516739 Here is a few pics, see if it inspires you