To be clear, my point was that the scans being used to argue that the Source can act as a mind and soul unto itself are worded in such a way that indicates that the Source is something that can have, or not have, those things. Not that a Source can inherently do that. For that reason, I do not agree with using that information to indicate a special form of resistance.
To further add to what Reiner has said and to address your message. It is not that a source can have or not have these things.
The source of every living person possesses those properties. I went as far as to pull evidence from the web novel. A source can be divided into 3 psuedo sources namely; A source body, source mind, source soul. Creating a source with these 3 things intact creates conciousness with life.
The reason Anos and Eleonore create only pseudo sources is to avoid creating tragic children. Anos and Eleonore have 10k daughters created by human hands through the use of Eleonore's magic after all.
Furthermore, the source is deeper than mind and soul yet it's components include a mind and soul. This isn't a cotradiction to the definition of the source, it's a distinction between the two things. There exists a conventional body, conventional mind, conventional soul then there is a source body, source mind and a source soul which can all be coined under the term–pseudo sources.
Characters have been killed and cast magic with only their source, that has been made clear after all, you agreed that their mid-godly regeneration should be changed to self Resurrection on a mid-godly level because it isn't passive– they have to actively revive themselves.
As seen in the scan above, Anos does revive himself with only his source. His opponent makes it clear he did so using only the source. There was no mention of mind or soul being used.
The next scan is Anos talking about Misha and Sasha. They can try to believe as much as possible with their heads– biological mind a.k.a the brain– but if they don't believe deeply from their hearts– conventional mind referencing both thoughts and emotions– from their very sources, then their spell won't activate.
It referenced both the brain and the normal mind and went ahead to mention the source.
Now looking at the total points from the first page, you believe that the source possessing a mind and soul/ acting as the mind and soul is a contradiction and rather the mind and soul is inside the source.
Should that hold true, then the unconventional resistance stands. You need to go through the source to reach their memories, mind & soul and without affecting the source you cannot affect those things. This is one of the ways to qualify for unconventional resistance.
Should the point I addressed with the scan hold true, then it ends up with the characters not caring about their mind and soul and being unaffected by whatever happens to them in other words, you affect/alter/destroy their mind and soul and they won't care. They shall continue to operate normally unhindered by whatever is done to those aspects as the source is what matters. This is some form of resistance or otherwise outright immunity but we index immunity solely on the basis of a lack of the properties being affected and to that effect, it has been left as unconventional resistance.
If I misplaced any of your points then please correct it however should my second point be true and you feel it is not a basis for unconventional resistance then I offer the solution of noting it down somewhere in the profile that the characters in question are not affected by the manipulation of these things