Talk:Scarecrow/@comment-3173617-20150303220528/@comment-10733658-20150416042249

The figure we saw in chapter 12 seems to have both arms, if you look closely. Of course, we won't know for sure until we see Amon in person.

More than likely, if he's considered a "defect" or otherwise a failure, it's because they couldn't convert him like they did Takizawa.