There is Princess Luna a Pegasus Unicorn and one of my favorite My Little Pony characters.
Luna is printed on this t-shirt in a nice pose that shows her wings and horn and it even has a purple banner that says Luna on it.
This print of My Little Pony Luna can be found on different style t-shirts for kids and even adults.
If you are a My Little Pony fan then you should check out this My Little Pony Princess Luna T-Shirt.