I wanna start off by saying that I am practically never certain about literally anything both irl and in fiction. The Kitetsu II and III have the exact same sword handle and sword guard, so far they are completely unique compared to any other sword shown in the series other than one: the sword that one of the Five Elders has. He's the one without facial hair and not shown in a suit and always carrying a sword (Kitetsu I :P). It's handle and guard are literally identical to the Kitetsu II and III other than the obvious different colouring. I am lowkey willing to bet my life on this