In the Touhou universe (and a lot of other ones as well), vampires don't die in sunlight; they just get depowered.
I fail to see that. The reason why she didn't face Tenshi herself in, "Scarlet Weather Rapsody", was because there was too much sunlight in Heaven. Also, sunlight can affect vampires in the Touhou cannon, as evidenced in Silent Sinner in The Blue, where Remilia had to quite her fight with Yorihime, because of the sunlight.
I fail to see that. The reason why she didn't face Tenshi herself in, "Scarlet Weather Rapsody", was because there was too much sunlight in Heaven. Also, sunlight can affect vampires in the Touhou cannon, as evidenced in Silent Sinner in The Blue, where Remilia had to quite her fight with Yorihime, because of the sunlight.
She would have her skin burned,and it will hurt a lot, and her power weakened (that could be very well the reason to not fight Tenshi and quit with Yorihime), but she wouldn't die anyway.