One wonders if cowl and co-conspirator are the same person, who separate ones?

It is possible, but Cristos has also been fingered as the co-conspirator.

I've long theorized that we'll find out that Justin wasn't really a bad guy.  He may have used rough means to attain his ends.

'rough means' as in baseballs to train shields? Not really a bad guy.

'rough means' as in thralldom? Still a bad guy.

Sorry Kindler.  I meant Harry's hatred of Marcone.

Marcone leads a more violent version of the Chicago government.

See, I don't agree.  I believe that Free-will has power over those who do not have it.  And intimately Uriel does not have it.

Further, Harry DID summon him in Changes.

And summoning circles are just for summoning, so if he is Summonable, than that circle(s) would possible do the trick.

Well... Uriel does have free will. He just only has one Choice.

This, to me, sets him apart from other beings who lack Free Will (like possibly Mab, and certainly nearly everything controlled under Winter Law). Of course Ivy also is partly human, and so locking her in a circle required a whole host of measures to block her Will simply tearing the circle apart... and I rank Uriel more powerful, so it would require a truly imposing effort to even come close to imprisoning him.

In fact, given it took an Archangel to imprison Ivy, who I rank significantly lower on the power totem pole, it wouldn't surprise me if only TWG or the Outer Gods (provided such outsiders exist) could even attempt it - and with TWG, at least, it seems obvious that Falling would have weird interactions with such an attempt.

I think we've discussed this before, but ...

If you'll recall, the circle in MacFinn's townhouse was actually three in one circles.

One for purely mortal beings.
One for purely spiritual beings.
One for a mix of mortal and spiritual beings.

I'm thinking someone with an iron will COULD contain Uriel in such a circle.

How, though? I don't think Uriel is like Mab or the Erlking in that he has to answer a summons. So he can just glance at the circle, think 'ah no' and appear outside it.

Or he can just use your Name and make you release him.

Kumori is someone obsessed with ending death. Someone who’s had a lot of loss or just one traumatic loss might become obsessed with that topic. Are there any characters who fit that?

Well, Demeter/Beckitt seems the most obvious one in terms of absolute obsession. But I don't think it would hurt Harry to find out he was Kumori - surprise, sure, but not hurt.

Argh!? I hope Harry doesn't have to go at it with either Mother....

I meant Queen-the-mother to be opposed to Queen-Mother (with caps). We have the maiden, the mother and the crone, but confusingly the crone is called Mother Winter/Summer.

I was referring to Mab/Titania.

I do not think so. The gates were not designed to kill everyone but to weed out those not powerful and versatile enough to wield the weapons they guarded. They were tests. There might have been something but it would not have been impossible.

A fire mage for fire, a winter knight for ice and a necromancer for dead, it would have been fitting.

Except those magics aren't exactly created equal.

On the other hand, we have an example of an ectomance binding a soul back into its body, so maybe there's a more benign way than necromancy.