Hi I'm kūkan Jikan Sakeme, the goddess of time and space here in Gensokyo. I adore sweets and pastries it's almost like it's my weakness but don't tell anyone. 
I'm always busy. I mostly use my powers to resolve time paradoxes and space related issues often caused by Youkai manipulating reality. 
I counter spell reality warping and time magic very easily, so sakuya is not an option to defeat me. Although, I must admit, Yukari Yakumo is way stronger than me. 