Went back and added some color to my old Rei'sen drawing with the pens and highlighters I have available. I would have added skin color too, but I don’t have anything I can use for that at the moment. I also really like Rei’sen with blue hair instead of the purple-ish one she is depicted with in Walfas, Inaba of the Moon, and KKHTA.

It certainly doesn’t have anything to do with my favorite color being blue or most of my favorite Touhou characters having blue hair (which certainly isn’t just about every single blue-haired Touhou character in existence).