Board Thread:Fanon Canon/@comment-136273-20180516103400/@comment-1399043-20180520172219

Silver-Haired Seireitou wrote: Nisshou wrote: Can I use the concept of Bakotto? or a demon equivalent of a Zanpakutou?

I don't see why not. Just that a Gotei 13 member would likely not be using one, or would have to keep it a well-protected secret

The character is a half-demon using it, so while affiliated with the Gotei (as they are a Protagonist) He wouldn't tell them what the weapon was.