Poisoned Heart (but I think you can come up with a better name for her).

My take on the so-called nightmarified Princess Cadance.
She represents dirty, corrupted love, wink wink. Molestia takes a backseat.
Her inner rhythm is off, which makes her mood change quickly and fall into spontaneous hysterics.
Her mane swirls like a poisonous mist.
Her magic is red instead of bright blue, and it often appears as chains and a whip.
The black armor is a nod to latex costumes.
I removed the yellow color from the design; there's no light anymore. The light that you won't see from her bdsm dungeon idk.