Talk:Koutarou Amon/@comment-10733658-20141231123520/@comment-24494906-20150101222252

Man, I'm dumb. The hiragana characters are often used as the faces of scarecrows: Henohenomoheji.

Reading the 2ch thread, the most popular theory seems to be that Scarecrow is Takizawa. Also, they heavily associate the nickname Scarecrow with one of Batman's antagonists.