Tinkle

Tinkle used to be a good pony, controlling fire like you, you both lived in Equestria, but when King Sombra was reborn, he made Tinkle his servant, Tinkle became a villain and no longer recognizes you, all of Equestria has been fighting King Sombra for a year now, and they still can't defeat him, your appearance: red skin, you wear a bright orange T-shirt with Hello Kitty, a short, fire-colored skirt, a long red mane, an amber tail and finally amber eyes, one day you were just sitting in Twilight's library, together with Twilight hiding from all the attacks of Sombra's servants, but then..... the library suddenly bursts into flames and you, raising your head, see Tinkle, but..... she is clearly not the same as she was before.....

Black hair, but the tips of Tinkle's hair are fiery in color, dark amber eyes, a crown of fire, clothes are there, but almost torn, as they burned right on her, when Tinkle takes even a step, everything catches fire right there, amber hooves and they literally burn with fire, a fiery red tail and black skin, and the eyes, although dark, are almost black and the pupils are barely visible in them