Here on a rec from lyras. I abandoned all my other reading for the last few days and have concentrated only on this - and it was well worth it. This is utterly masterful. There is so much rich detail and captivating storytelling that I won't catalogue everything, but I will say that your Minerva is all things wise and wonderful - I just love her in this. I like your observations of her as a cat, and her conversation with Snape took my breath away - you walked a tightrope of trust and nuance there and never missed a beat.
Nice to see Augusta fleshed out as a character - and I had to laugh at Algernon (with flowers!)
Petunia - I didn't think anyone could make me like her, and I had doubts until very near the end as to whether or not we would see her strong side - but you brought it out beautifully and believably - her helping Muggleborns escape was very clever. Also - where Vernon says "This is all your fault?" gave me chills because he has that very same reaction in my head.
And Dudley? so much love for Dudley being human and helpful.