Okay that kinda gave me a thought
so Kira seems to like cats, right?
What if during the Centipede Shoes fight, Jotaro still gets taken out, but much later than canon because he doesn't have to take a hit directed at Koichi and specifically after he calls Josuke and Okuyasu. Then he gets a tad exploded, knocked the fuck out, Koichi gets a bit hurt and then good ol Kira shows up
But as has been made very obvious, Koichi isn’t a person this time. Koichi is just a Little Guy™ and Kira would have no reason to see him as an enemy, especially if Koichi didn’t have Echoes out right now
And what if in all the chaos…… Koichi’s collar ended up getting ripped off
So Kira takes one look at this tiny, collarless, badly injured and filthy cat and assumes it was just a stray who got caught in the crossfire and decides to adopt him, or at the very least take care of him until his injuries heal. There’s a bit of a hiccup when his identity nearly gets found out, but no biggie, he can just threaten the local Stand Beautician into changing his identity and then kill her ✨
So now…….. Koichi’s stuck. Kira is a surprisingly good and caring cat owner and pulls out all the stops, including refusing to let him outside, and Koichi is genuinely scared about what would happen should he reveal the fact he’s a Stand User. Plus, it doesn’t help that he’s healing from some pretty severe injuries and has difficulties moving around. It takes days before he’s able to walk again, and even then it’s with a limp
And of course, Shinobu is COMPLETELY on board with this. Seeing her husband return from work not only much more different than before but with a small kitty he wants to help? She is head over heels and more than happy to help
There is definitely some amount of rivalry between the two cats. On Koichi’s side it’s because Stray is just completely chill with all the murdering Kira does, and on Stray’s side it’s because of all the extra attention Kira gives Koichi. Kira has had to separate these two on NUMEROUS occasions, which eventually leads to him deciding to keep Stray in the attic to protect the presumably Defenseless Normal Not-A-Stand User Cat
I do think when Hayato starts poking around Koichi ends up revealing himself to him, if only to try and get another ally
and then of course, on the other side of things everyone high key thinks Kira killed Koichi because when they find his collar there’s blood on it which is just another tally to put on the shit list because What Kind Of Asshole Kills A Cat You Sick Fuck. And as far as Koichi’s family is aware, he died in the “gas explosion” that happened, so they don’t put up any Missing posters
thankfully they’re all very happily surprised a few weeks later when things gets solved and Koichi manages to escape :D