This is the Yunhausen Effect. It's wonderful that belief can make her sidelocks move.
The Barkhausen effect refers to noise caused by magnetism; the author probably means placebo effect. After that, flap-flaps were recognized as things that moved. The number of flap-flap Reimus grew and grew, and now flap-flap types have become the main type.Chucchu?By moving these parts, she moves her flap-flaps.That's right. The bases of her flap-flaps are moving.writhe writheThe original yukkuris didn't do flap-flap with their sidelocks.
But at a certain point in time, a single Reimu's flap-flaps moved.Chu? Chucchu!