(Reitaisai 16) [azmaya (Azuma Aya)] Ihen ga Okita node Fuku o Tsukuru Koto ni Shimashita | There's Been an Incident So Time for Some New Clothes (Touhou Project) [English] [DB Scans]
@ART65 She. Azmaya and lots of other official Touhou artists are women, like Aki Eda, Chiha Ayami, Nemu Matsukura, Moe Harukawa, Ginmokusei, and many more still unconfirmed.
And yes, she seems to love designing clothes, as seen in Wild and Horned Hermit where the main cast wears a slightly different outfit in every chapter.