Why do people draw Twilight Sparkle as a black girl?

Twilight Sparkle, a fictional unicorn pony from the television series "My Little Pony: Friendship Is Magic," is typically portrayed with purple fur, a flowing mane, and a horn. While fan art can vary, there is no specific reason why some individuals choose to draw Twilight Sparkle as a black girl. It is generally unrelated to the canon character and represents the artist's creative freedom or interpretation.