Ooooh, I've wanted to read more Galatea Merrythought fic for ages (I think I've only seen one before), and what a great take on her and Griselda you give us here! Kick-arse fighting women who know what they do and what they want – I love it. The dialogue is awesome, and the whole story excellently-paced and vividly-told. Also, the last two lines made me sigh with happiness.
One bit I especially love is this exchange – a beautiful mix of wisdom and humour:
"When you reach a certain age, and you stand before a classroom of teenagers who barely know the business end of a wand from its grip, though... They start to give you a look. It's less about boredom and more about pity. They look at you and no longer see you as a pool of knowledge from which they might drink. They simply see you as old and slow and beyond your prime."
"Did they injure your feelings?"
Galatea slapped Griselda with the wash cloth. "Shut it, you."