To Murphy, I'd add a bunch of personal issues that hurt her more than mere physical injuries.
- Seeing her second husband marry her kid sister.  (Effectively "I'd love you -- if you were younger and less you") (BR)
- Feelings of failure associated with not taking over her mother's matriarchal role in the family. (BR)
- Finally opening up to a relationship with Harry, getting all dressed up for their date, showing up and finding his blood and a bullet hole.  (Shades of Angelus's gift to Giles...) (Ch)

To Charity, I'd add a bunch of things that happened to her kids, but most especially Molly in PG -- Molly inherited the power from Charity, and Charity would blame herself for Molly keeping the magic a secret, and nearly getting her head chopped off.  This is probably the single worst thing that ever happened to her.

To Susan...
- Sifting through body parts of ripped up children, putting them back together to learn if any of them were her daughter -- all the while dealing with the lust to suck the blood from the pieces.
- Maggie kidnapped by the Red Court, to be sacrificed.
- Martin's breathtaking betrayal -- possibly the closest relationship of her life.  Ten years as partners in the Fellowship, and he gave her daughter to the Red Court.  And, no, the betrayal wasn't fake.  He *really* betrayed her, even though it was part of a betrayal of the Red King as well.

And if you're going to list one-shot characters like Kim Delaney and Meryl, Lydia probably deserves an entry.
Lydia:

• Cassandra's Tears -- it's already a curse, knowing the future and not being able to get anyone to believe you.
• Specific dreams about the Nightmare coming for her
• Hiding in the Church while the Nightmare rages outside
• Kidnapped by vampires
• Almost sacrificed to desecrate the Sword
• Possessed by Nightmare

Maybe Harley MacFinn as well.
- Loup Garou curse.
- Destruction of his circle -- guilt over the deaths, especially Kim's.
- Killed by Harry.

And Helen Beckitt/Demeter

For Thomas, I'd throw in his backstory -- his Father has been trying to kill him for years, he's a psychic vampire in love, and the single worst thing that happened to him: he ate Justine, and thought he'd killed her.

Rawlins -- add that he got exiled to SI after the events of PG.

To Ivy, I'd add the backstory -- it's an incredibly painful childhood trauma.

To Carlos and to Luccio I'd add Cristos having them "arrested/detained" during Changes.

Mister had his home burned down!

Mrs. Spunkelcrief had her home burned down.

The Willoughbys had their home burned down.

Abby got shot in the belly [GS] (Ack.  Did she die?  Search doesn't show any mention of her beyond "They don't know if she's going to live or die.")

First thought:  Mother Summer's more likely to be Clotho than Lachesis.

Why: Mother Winter is Atropos, the cutter of the threads, associated with death, destruction, and endings -- definitely fit.  And Mother Summer should be the opposite of that -- associated with birth, creation, and beginnings.  That's Clotho.

Lachesis, the middle Fate, is in many ways the most powerful and important.  She controls everything else that goes on in between birth and death.  Pretty much everything we think of as our fate or destiny.

I'd imagine that whoever wears the mantle of Lachesis is actually even more powerful than the two Mothers, at least by a little bit.

My WAG: The White God snagged the mantle of Lachesis (along with a *BUNCH* of others, like "Allfather", which Odin used to have) during his rise to power in the first millennium.

Another WAG:  The triparte Hindu gods -- Brahma, Vishnu, and Shiva are mantles that are equivalent to the three Fate mantles, so Mother Winter would answer to Shiva as easily as Atropos.

Final, and wildest WAG:  The Name that Mother Summer was worried Harry might have guessed?  That other tripart god -- the Christian Trinity.  Of course the three parts don't match up at all well with the Fates or the Hindu Gods... but there are three parts.  This one falls apart, though, when you try to imagine that Mother Winter is the Holy Spirit or Mother Summer is Jesus Christ (or vice versa -- I can see arguments either way).  It seems like a bit of a stretch, and the mythologies don't match up well.

The two of them together sharing a mantle like Gaia (Mother Nature, Mother Earth, whatever) seems more likely -- though I'm not sure we've ever seen more than one "person" sharing a mantle like that.  Is it possible that the Mother is just one person, but at Her power level She can manifest separately in each of her mantles without worrying about the fact that she's in two places at once doing two different things?

Well sort of a joke. 

Here is where it all came from:
JB has written that we all have missed two major clue bats in turn coat, and quite a few of us went gonzo trying to figure out what they are. I Believe it was He Whom Walks who first noted that in turn coat, when Harry is searching for Thomas, he does not use his most obvious tool, little Chicago. In fact, it’s not even mentioned in the book at all, unlike every other book when it is used or not, only referred too as a ‘tarp covered table.’
Second, Harry has nasty headaches throughout the entire book. Now there are several ideas about these headaches, many of them involving his brain damage, but especially in light of his not having them in changes, it seems clear these headaches are cause by someone messing with his head, just like the headaches he got in small favor when Mab messed with his head… hmmm…
Third, someone has messed with little Chicago before, during proven guilty, when Mab was involved oh so strangely with Molly. (more on that later.)
So, this led some of to speculate Mab had messed with Little Chicago again, or at least made Harry and Bob forget it existed at all. But Why?
Removing Little Chicago prevents Harry from finding Shaggy and Thomas directly. It has several results, but the largest is it forces Harry to bond with Demonreach, something that JB has written he ‘will deeply regret later.’ Note that Mab, at this point, has considerable other options; She could, for example, have just walked in and offered Harry the winter knight job in return for her help rescuing Thomas. Or unleashed Lea. And those are just the unsubtle options.
Ergo, if we follow this logic, Demonreach is important to Mab, and it is important to her that Harry have it. Why? Well, many possibilities, but in my scenario, it is because Demonreach is the earthly location of the sidhe table (it is directly below it, remember summer knight); this is where, 75,000 years ago, a mortal wizard ascended to become Mab, causing the last major ice age. ( And creating that lovely source of permanent dark magic the island’s warden protects.)
It all came together one night when I was really tired and remembered JB had said this:
‘Well its one of the Laws (time travel) and Harry hasn’t broken it yet, so he will have too.’
So we have Mab, who knows way too much about what is going on and what will happen in the future, who can walk right thru all of Harry’s wards anytime she wants, who forced Harry into the position of Demonreach, somehow predicting that he would take that option…
We have Lea, quite interested in Molly, even back when she was a kid.
We have the entire darn book of Proven Guilty.
We have Molly, whom has powers of illusion, enchantment, and mind control.
We have Mab, whom was probably human once, quite legendary for her illusions, enchantments, and mind controls.
And we have Margaret Katherine Amanda Carpenter; Margaret from Marvarid, also spelled Margot, Marit, and Maeb..or as JB spells it, Mab.
Time travel + location of sidhe table + eternal regret of Harry … Molly is Mab.
As to the rest of the queens, I suspect they came later actually, (Mab says she IS Sidhe, not she IS A sidhe.)…Molly recruited them to balance her out, and end the ice age she accidentally started.
Or as others have suggested, her personality split into pieces..but im in favor of the recruiting idea.

Enjoy disproving.

This is a neat theory --- but how do you account for the Mothers?

A Rite of Ascension might give you enough power to equal (or create) Mab, but Mother Winter and Mother Summer seem *vastly* beyond Mab and Titania.

Where do they fit in?