"Can a Muggle leave a permanent mark on a wizard's life in a non-magical way?"
"Yes, that means it will become a 'bad debt' that he will never be able to write off in his lifetime."
Not relying on a wand or bloodline, Penny Evans, as the personal 'financial advisor' hired by the principal of Hogwarts, specializes in—
Honeydukes candy purchase accounts and Lemon Olaf inflation rates; annual repair costs for the Whomping Willow and Peeves' prank damage assessment;
And... Record every lie that the white-haired old man tells that starts with "This is the last time."
She loved him all her life, but that was not love.
Love needs an echo, and her love is a universe of its own.
Like a planet orbiting a star, it never asks to fall, but is only willing to be defined by its light to define the trajectory of its life.
"Dear Professor Dumbledore: What is the wizarding world like? Can I... Go? Petunia Evans, 1971"
Half a century later, in the old house in Godric's Hollow, two portraits stood side by side quietly, with a line of small words engraved on the edge of the frame:
"Receivable: Eleven unsent replies.
Cope with: A whole life without magic but full of miracles.
Balance: Eternity. "
It turned out that he had already replied, spending his whole life in silence writing:
"You are too precious and I cannot love you according to the rules of the magical world.
So I invented a special rule for you——
You are allowed to leave your fingerprints on my castle, but they must be hidden in the ink of the ledger;
You are allowed to call me grandfather, but only after all wars are over;
You are allowed to possess eternity, but your title can only be that of a 'financial advisor'.