In that case Yuugi has a horn or you should also include Suika in that list. And doesn't Koa have little demon wings on her head? Although since there is no official image of her, so it would be hard to say.
In that case Yuugi has a horn or you should also include Suika in that list. And doesn't Koa have little demon wings on her head? Although since there is no official image of her, so it would be hard to say.
And as long as it's going out of you body, it doesn't count as headgear so a big no on Yuugi and Koakuma.