Talk:Hideyoshi Nagachika/@comment-180.191.130.156-20150828093617/@comment-10733658-20150828094134

The primary evidence is Hide's unusual knowledge of Ghouls, the mystery of him being the only major character without any sort of background, and "Hideyoshi" fitting the naming pattern of the Washuus. (Though the kanji is not the same, we already know that changing the Kanji but not how the name is read is a typical trick.)