I mentioned in one of the threads that I'd attended a charity dinner where JK was speaking and had a theory that I wound up defending in a Tumblr challenge a few years back. 

My theory is that Molly Weasley had her own Deathly Hallows in the final battle. 

While viewed as a children’s story, or a physical quest, there was much more to the Deathly Hallows than that, the mastery of death could lie not just in objects, but in the right mix of people. The theory, hotly debated amongst vigilant believers, was in current contest as those three Hallows were united as they dueled against Bellatrix Lestrange.

There was Luna, the Resurrection Stone, the girl who fed thestrals, missed a mother and danced in and out of everyone else’s version of reality. The girl whose haunting alternate ways so often helped others get back to themselves when feeling lost or alone asking nothing in return, helping them resurrect who they were when they vulnerable.

There was Hermione, the Invisibility Cloak that had shielded others so many times, often invisible and unthanked in her constant support of everyone. The cloak’s true gift lay in the ability to shield others, not just a single wearer and never tired out. For Hermione had never left Harry’s side, had helped Hagrid for ages on his case for Buckbeak, had knit hat after hat for house elf rights, had been the constant plan maker to hide them from trouble. The girl who was tortured to shield others.

There was Ginny, the Elder Wand. The girl who stood toe to toe with Voldemort in a very private battle for months on end and ensured the only causality would be herself. If it is assumed the castle wasn’t doused with Flelix Feliciats, then Ginny was actively thwarting the giant, murderous creature she kept releasing while blacked out from killing.  Chamber opening, rebellion leading, unmastered Ginny who showed Tom Riddle having a thing was not the same as being able to use it.

Their mistress was one Molly Weasley, who could selflessly possess the attributes. A daughter by blood, a daughter by heart from across the hill, a daughter to be. When faced with a depraved killer who had felled notable duelists, Molly could not be beat. The mother in her, the fresh grief she had might have been enough, but her Hallows ensured Bellatrix would never harm again.