I’m just going to throw this out there, in my own headcanon for Touhou, Reimu’s hair glows purple when she uses her Float ability at full power, at which point she simply “floats” away from reality, such as when she uses the spellcard “Innate Dream”.
Noa: "Yes. Of the thousands of, and the tens of thousands of unrequited love confessions, you're the one who made me forget my my love to him. I sacrifice." *rapes Sensei*
