Touhou character introduced as the stage five boss in Legacy of Lunatic Kingdom. Later appeared as a prominent character in the manga Visionary Fairies in Shrine. A Hell fairy and subordinate of Hecatia Lapislazuli.
She has very long blonde hair and pink eyes, and wears a pink polka-dot jester cap and American flag-themed clothes with a neck ruff. It depends on artist, but it can be an american flag dress or american flag shirt with flag pantyhose/leggings/pants and usually no shoes. She has fairy wings and she also carries a torch with her.
According to ZUN, she's specifically a Lampad, a kind of underworld nymph who can drive people to madness and are companions of the Greek goddess Hecate, on whom Hecatia is based.