HRtP Shingyoku's Theme: The Positive and Negative

This is Shingyoku's theme from Touhou 1: Highly Responsive to Prayers Well, uh, Shingyoku's guy form looks miserable. And Shingyoku's girl form looks ready to kick ass. C'mon Guy!Shingyoku (I'm going to call you that, okay?), be more optimistic, like Miss!Shingyoku (I'm also going to call you that, 'mmkay?) over there. I guess thats why its called the Positive and Negative. But, what's up with the coin form? I really do not get that. Well, since she's a guard, I guess it's to scare the crap out of people to make them stay away. You could learn something from her, or... it..., Meirin.