From Johou Battle:

A Yamabiko (an echoing yokai said to have lived in the mountains and has recently become a priest-in-training at the Myouren Temple!# She is rather timid, and can be heard whispers sutras when under stress. While she aspires to learn, her current duties are actually quite simple:#Clean the temple, practice her mantras, and greet guests at the gate while keeping trespassers at bay. This leaves her a bit bored with temple work. On the side, she's working on bringing punk rock to Gensokyo, even putting on concerts in a band with her friend Mystia!

That is, when she isn't being disciplined by Byakuren for trying...