Board Thread:General Discussion/@comment-27140233-20151109022617/@comment-27140233-20151112164209

Schiffy wrote: "Filler" or "not-canon", were things not created by the author of the manga. Muramasa is a filler character. Amagai is a filler character. Nozomi is a filler character. Ashido Kanō is a canon character who first appeared in a filler episode. The spirits of Katen Kyoukotsu are (as we've learned within the past few weeks) canon characters that first showed up in a filler arc. There is most certainly a difference. This site is more than just forums. There's plenty of informative articles. I'd suggest reading them.

Filler means that is not canon. Is the same thing if you understand it another way that's your "opinion" i go by what is establish. The spirits of Katen Kyoukotsu were Filler and now they are canon but the whole Rebellion Arc is "not canon" Why? Because it was not in the manga. So, everything else that is not in the manga is not canon. You cannot say that Ashido is a "canon" character because he was "suppose to be in the manga. If he was put in the manga the he will be canon but since he was not them he is not canon. It doesn't matter if he was suppose to be canon.

EX: I was suppose to the Beach on Sunday but i didn't get the chance too. I can't suddenly say on Monday that i went to the Beach on Sunday when i didn't.