Which is why, in Gensokyo, he's practically guaranteed to exist as long as there's even one person who believes.
Indeed this is not the first Touhou comic I've seen use this plot and yet the irony that it's stuff like vampires, Oni, cat people, etc saying "Santa doesn't exist!" never fails to crack me up.
I wonder what I'll get from Santa this year?I wonder if I'll finally be able to meet Santa this year?December 24Yaay! Tomorrow is Christmas!I can't wait~♪No, Sakuya, stop right this instant!Don't stop me.This is a path everyone must cross eventually....Milady, I've been meaning to tell you but...Santa doesn't exist.Uuー☆