kinomoto_sakura_(water_drop)
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.