You're not cute enough to be a yamabiko.
Which isnt an insult, because yamabiko are insanely cute.
Look at those giant, fat, soft, suckable udders that little trollop is sporting.
You must molest the yamabiko.
Yukari must marry and procreate with Reimu for the sake of Gensokyo's future.
She's cute and pure, not to be sexualized.
Which is a waste given how she would probably be so loud in bed that the entire temple would be in awe and envious.
Alas, she's to pure for that.