Seeing as she's seen a bunch of other toku, feel free to have Yayoi have seen some sort of equivalant for GARO, though I do warn that Rei here is going through Makai Senki (2nd season) right now and I'd rather not have him spoiled for what happens.

But first season, the special, and Red Requiem canon are all up for grabs! 8D It'd amuse the hell out of him and me, I think.