Goblet of Fire, Bertha. We could possibly assume that her Obliviation was intended to be of the undoable sort to begin with, like what canon!Hermione did to her parents (so Bertha could still work on her job while she was at work, or regain the memories after the Tournament).
Huh. I had no memory of that (appropriately enough. :P) *goes to look that up* Huh.
Although according to this, she did suffer permanent brain damage from the memory charm itself, so not exactly what I’d call reversible, but yeah, point to gwern and you.
Goblet of Fire, Bertha. We could possibly assume that her Obliviation was intended to be of the undoable sort to begin with, like what canon!Hermione did to her parents (so Bertha could still work on her job while she was at work, or regain the memories after the Tournament).
Huh. I had no memory of that (appropriately enough. :P) *goes to look that up* Huh.
Although according to this, she did suffer permanent brain damage from the memory charm itself, so not exactly what I’d call reversible, but yeah, point to gwern and you.