Vihane

Vihane means anger in Estonian She's basically a demon pony. Her hooves have these spike thingies near their bases, and each has the potential to secrete poison. Her tail splits halfway through its length and becomes two. She's slightly taller than most ponies, and her hair is actually a dark blue, not the purpley it looks like it is on my computer screen right now. She can only use her horn for magic when she feeds off of negative energy, ie when someone is extremely angry. She is often solitary, only bothering to show up around other ponies when there is a lot of tension or fighting. She generally lives deep in the Everfree forest, in areas unexplored by anypony. The main sightings of her were on the outskirts of the great battles of Equestria's history, mainly those involving Tirek, Nightmare Moon, Discord, Queen Chrysalis, Sombra, and the like. She has met Princess Celestia before, but only when summoned, as she likes to be alone. In her meeting with Princess Sunbutt the two came to an agreement. As long as Vihane never caused battles or tension of any kind to draw her power upon, she was welcome to come and go, and draw energy from skirmishes she happened upon. In rare cases, Vihane has the power to drain the negative energy so much so that the battles just stop, and the ponies involved forget why they were fighting in the first place. This is only rare because she finds it more in her favor to let bigger battles rage on, as she will eventually have more power to gain from it.