I discovered you can actually do a crazy infinite in this game as long as you currently have Momiji as your GF.

Combo Notation:
> - chain
st. - standing
j. - while jumping
, - link

The input is very simple and easy:
9j.L > j.GF > land/double jump > repeat

notes:
Jump as soon as you land on the ground. Mistime your jump and you'll drop that shit!
This can actually be done both full screen and in the corner as well.
This might get patched out in a later update so this'll be outdated soon.

An alternate variation (debatably harder) :
5st.L > GF > 9j.L > j.GF > land/double jump , repeat

what version are you on? is it the version with momiji's needle attacks or just her web? i couldn't get it to replicate, the hitstun stops being long enough at 18 hits (though it's certainly enough to defeat a lot of enemies)

this route with katana [5L > 5H > jump > j.L1 > j.L2 > j.H > landing > repeat...] loops, though it also becomes air-techable (combo counter is black, and you can even see the hitstun meter under ribbon's portrait doesn't even stay on screen anymore, the ai in this case doesn't try to tech at the moment making demonstrating this easy) (it  also starts itself, since j.H is what ends up launching)

there are a few attributes that decay combos (juggle height, gravity, hitstun and hitstop), not entirely to remove infinites (which i'm ostensibly fine with), i just want figuring out infinites or loops to have some friction to it. the little meter under the combo counter also shows the current decay rating.

Should've mentioned I was playing on the 0.2024.08.17 version. Anyway...

I managed to get the 20 hits on it with React Block turned on, but I only got at most 10 hits on the second variation. Looking further into it, I believe it has something to do with the double jump. I think double jumping is a lot faster than immediately jumping after you land, so you get those 2 extra hits per jump. You can still do insane damage if cancel the last GF hit into j.236H then super cancel. I probably should've been labbing with React Block on, huh?

Note: I actually somehow got 22 hits on Hiyoko while I was testing this, but I was unable to recreate it after.