You aren't posting manga.
I really wish someone would pick this back up.
And although eleven souls has only three chapters it looked like it could be something good.
Another 10 chapters just got uploaded there might be more so keep an eye out.
Better than the Ghost in the Shell Manga in every way.
That would be Dark Whisper (ダークウィスパー) by Ikuto Yamashita.
It says its weapon has an axe form, but I don't believe it's ever shown, unfortunately.