I don’t know about Apoo but Yamato having his own scabbards is very plausible I wouldn’t mind seeing that myself, I’m just wary about the time left in Wano and those characters development.

Hear me out, if Yamato is hell bent on being like Oden won't that mean that she would also have her own Nine Scabbards. Maybe some of the flying six are on her side and maybe that's where Apoo's aliegance lies with.

I would actually like more characters to be introduced.

That new character and the nine scabbards