kinomoto sakura (marine jester costume)
A costume that Kinomoto Sakura wears in Clear Card Arc, specifically in episode 9. Take care not to confuse this with either the Blue Jester costume or the Blue Sheep costumes from the 90s anime.
She wears a blue jester cap, a blue jester-themed dress over a blue skirt, blue elbow gloves, and blue thigh boots.