The book that the Chill is introduced in, as well as one of the comics where they actually show a Chill doing exactly what Im describing.
I was hoping for a specific example or showing of a passage, but since 'touching intangible things' isn't a factor in this fight as we've both agreed, this discussion really doesn't need to go any further.
She does not NEED knowledge of Maka's abilities. It would still work because thats a tactic she does in her own verse, she doesnt know that it would sever the Resonance but it would still happen as a byproduct of hr fighting the way she fights normally.
Again I am approaching this in good faith, but do you have any showings of Ruby herself ever inserting her Aura into another person during a fight to produce... any kind of effect? As far as most combat is shown outside of Semblance uses, Huntsman and Huntresses just coat their weapons in their Aura and use it to beat people harder. It's not like they're doing target soul strikes seeing as how 'going directly for the soul' isn't even really a thing in RWBY content. If you've got any examples of Ruby doing this, I'd love to see them. Compounding on this, do you have any showings of Ruby using her Semblance to move an enemy combatant against their will with her Petal Burst? All her showings moving others have been with her friends (that I am aware of and have seen myself)
Okay good, I'm glad you acknowledged that Maka and Soul therefore have showings of high resistance to being hit by soul based attacks. As this series has regularly shown us, even blocking an attack by someone who is stronger than you can still hurt you. You yourself acknowledged in this thread Maka blocked attacks from KinshinCrona and did not get hurt from them, therefore the story is telling us that Crona is not so vastly stronger that it can hurt them even when blocked.
...mon frere there are tons of people with that ability in RWBY. Just from Semblances alone Jaune:
A healing and boosting semblance. A specific use power that he's never used against an enemy combatant.
A masking field type of semblance that blankets others. He does not force his Aura into others, he masks
over them.
A draining Semblance, not forcibly inserting or disrupting anything. Simply slurping up. Notably doesn't disrupt the Aura.
Doesn't disrupt the Aura, but bypasses it to make the target sleep. Similar in a way to the Apathy which was able to affect people through their Aura. This isn't Aura disruption.
Stops people from using their own Semblances. Again, bypasses the Aura to affect the target. Not disruption or forced entry.
Makes the target share their Semblance. Described as "The victim's Aura being tugged at". Again, not disruption and even described as the target's Aura still being active.
None of these described in-universe fit the criteria of "Specifically shoving their aura into the target to disrupt their soul-based power" which was what I was arguing. Covering your weapon in your Aura is basically giving it a field that makes it hit harder. It breaks Semblances because it's big force slamming against a force field, not because it's a now magical weapon that bypasses defenses to hit the soul directly. If it did, you'd think it'd be a super prominent way to get past the whole "Aura is the only thing protecting you from getting one-shot" thing in fights.
To build off of your Ren example, Fox also demonstrated the ability to make Grimm explode through internal Aura damage. Hell, going by Pyrrha's showing and description in episode 6 (As well as our current RWBY profile and the RWBY wikia's page for Aura), literally anyone with Aura can insert it into another person or object.
And again, Fox also doing this does not dispute my argument that they both did this to Grimm, creatures specifically that have no soul. This technique is never used on a Non-Grimm target in the series' 9 Volumes (that I am aware of) and if it
was something just anyone could do it'd be SUPER USEFUL to finish fights. Why go through all the trouble of long drawn out battles that depend on your Aura Shield and endurance to keep you alive when you can just Omae Wa Mou Shindeiru your opponent and finish it that way. Pyrrha showed that someone can
activate an Aura in Volume 1 and that is... never brought up again. It's not Aura intermingling if Jaune didn't have an Aura to being with. Just because I pressed the power button on my computer and turned it on it doesn't make me a Technomancer.
Not sure what this has to do with anything here but okay.
What this 'has to do' is if your argument is that Ruby can just Aura Punch Maka and Soul's resonance apart, then they can just... Resonate again. Just like how they were able to Resonate after Crona's Wavelength Poison was no longer an issue.