This has been considered, but I don’t think she would be very gentle with him.

To be fair, neither was Molly, and he survived that...

I assume that Butcher is trying to show the change in Butters over time, but he’s not acting like a Knight of the Cross – he’s acting like a Knight of the Sidhe.

Consensual non-monogamy seems perfectly in line with a Knight of the Cross to me.

The Knights of the Cross work for God, and God is love.

Isn't Ebenezer a descendant of Merlin? That would make Harry a descendant of Merlin too.

Even notwithstanding the fact that everyone is descended from a monarch, who says that the bearers of the Swords have to be descended from monarchs?

She is also responsible for the seasons in Ancient Greece - the 6 months she was down in Hades’ realm was Summer, where as the 6 months she was on earth were considered Winter.

Corrected. Summer is the most brutal and barren season of the year in Greece, and winter the most mild and fertile; thus, in the original telling of the myth, the time of year that Persephone spends with Hades is the hottest time of the year; with Demeter, the coolest.

The story changed as it traveled northward to areas where summer is milder and winter harsher.

Harry was a Starborn wizard.  He may not have achieved great power yet, but he was far ahead of the curve for most wizards his age.  And the Angel-caliber entities will know he's Starborn, and will see his early power pointing to his upcoming puissance.

And we KNOW they play long-term and often subtle strategies...

Did some Fallen Angel tell Harry a Lie in Storm Front or earlier in Fool Moon, though? It's not like Uriel to tell Harry a Truth for any other reason.

But then, Uriel isn't the only archangel, is he?

Uriel wouldn't have told Harry that seven-word truth in Fool Moon unless some other angelic being had told him a seven-word lie prior to then, and angelic beings were way out of Harry's league as of Fool Moon.