siyudi (cookie)
A derivative character of DIYUSI, spawned from the popularity of DIYUSI's Cookie☆ MADs. She has black hair in a high ponytail with a red hair bow, red eyes, white skin and wears a collared white shirt with long sleeves, a red ascot, a black suspender skirt, and holds a red closed umbrella.
Whether or not she was accepted as a Cookie☆ character was controversial, as she was a completely original character with no attached voice drama. Over time, she has been slowly accepted as a part of DIYUSI's group as DIYUSI herself is barely a Touhou character anymore.