I think she’s wearing pants that have a cutie-mark on them. The show kinda did that with Wonderbolt outfits. But I’m surprised I’ve not seen any fanon clothing lines do the same thing. Because they totally would.
Or maybe she’s wearing something transparent.
If she were a unicorn, I’d swear she was my friend’s old OC with those colors and that sense of fashion.
Or maybe she’s wearing something transparent.