>>49657298
>>49657237
Long time sukusuku hakutaku appreciator here
I'm rather certain that the first drawings of these were by the japanese artist "rebecca"
At first a spoof of keine's "EX" mode and hakutakus as a whole.
Then she drew a few of keine's friends as the cute critters
Then spread to other touhous
Then other artists started to draw them too

I have a few of her first doujinshis and merchandise, and a original stuffed hakutaku.
Not the giant one though, sadly....