I'm not sure if she did mean it literally or if it was just an expression inspired by Japanese mythology/beliefs, but I would love for it to be true as a Kiku stan too naturally.
She may be like Katana from DC in that she can trap the souls of who she kills in her katana I believe? I've been waiting for something like that in OP, I thought BM or Brook (who imo kinda reminds me of Ghost Rider) could and would do this, but Kiku doing it instead would be awesome!
Would be interesting if she actually injured Kaido's soul during her attack on him ofc. Would be fitting for a tormented soul character like him, someone who has commited al ot of sins too.
Could she have a cursed sword actually? That may help explain it potentially? Cursing the soul? Apparently DC's Katana's er katana lol is called Soultaker and it can take souls of who it kills, it's cursed and even makes those of evil minds commit evil deeds. These seem like concepts that would work so well with OP, especially with the cursed swords ofc.
But yeah back to the actual question, I think her cutting BM's homies would be really cool, but it would take away from Brook being able to do it though. His DF is the parallel/contrast to BM's or whatever but on the other hand, I would love to for Kiku to be able to cut the homies too.
If Kinemon can cut fire and we've seen the "breath of all things" before as well as "Ryou, the flowing haki", why not cutting souls too?
Jut have it so Kiku can't "freeze them" like Brook can with his DF. She can only wound them?
Yeah, Kaido’s homies!!
:cantseeme:

Also, lmao to this. Well played.
:cheers: