Even after the Obliviate Hermione had cast on her parents’ was reversed, the damage to their brains was irreparable. Both Drs. Granger had suffered from premature dementia in the years afterward. Harry remembered Hermione’s grief and guilt over it well. He remembered the pain of this time. Hermione warring with the joy of gaining the prestige of winning the election, of having another baby, and also contending with the tragic consequences of her attempt at protecting her parents.