Your posts about Nameless are forcing me to reread The Law again.

Don't bother, the entire first section is his own personal fanfic. We have no idea how Marcone met Nameless. Or why the way Cowl says "Harry is a PITA" rather than "Dresden is a PITA" on seeing Mouse means that he calls Marcone, John. I guess if Nameless really is Cowl, contrary to WoJ that we had seen his alter ego long before "The Law" was ever dreamed up, then it would be. However, Nameless does not refer to Marcone by any Name during their one shared scene. No one present is named by any other attendee.

Nameless is not one of Marcone's confidantes, he's an employee. And Nameless, despite being a rebel by nature, is also a denizen of the supernatural world where proper etiquette is a key component of all interactions. No matter what he may think, I'm sure he addresses Marcone as Baron, otherwise it'd be akin to a challenge.

Harry's familiarity with others has caused him no end of trouble, Nameless knows to avoid this.

Another hint in the Justin is Cowl idea.  Cowl is wearing gloves in every appearance, even when sitting in the farmhouse here. Why? Because he's been severely burned and needs to keep himself covered.

Cowl also sees Mouse and says "Harry is a pain", not Dresden. Both are correct but using Harry seems to make him much more familiar. As if he knows Harry from conversations and interactions beyond what we've seen in the books. I don't think someone who's only been in adversarial interactions with Harry would casually refer to him by his first name.

I am more and more convinced that Justin is Cowl.

I think they love but can't stand to be around each other. Some of that's personality and some is the Mantles being opposites. I also think Titania is more standoffish because she feels the hurt of their separation more than Mab and doesn't want to remember it while Mab just soldiers through any pain.

Winter is an army fighting a 24/7/365 hot war to defend to the death the existence of a group of people who have no gratitude and give only an inkling of assistance. Sometimes Mab has to involve the protected and those plans definitely follow the omelets and eggs strategy. Also, when those soldiers get leave they want to run wild. Summer's job is to be the MP's that prevent the worst excesses in both cases.

As far as the love-hate relationships go, they're similar to families with domestic violence issues. They fight like cats and dogs but if a third-party steps in or crosses them, they both turn on them like piranha on a pig. And their relationships run a full spectrum from screaming and hair pulling to friendly professional rivals. There's a reason the Supernatural world developed such an elaborate and formalized etiquette system.

I highly doubt that anything short of the Mothers could stop a Nemfected Mab.