20Hermione Became Minister of Magic
After Deathly Hallows, the main trio became successful in their own right. Neither Harry nor Ron could quite hold a candle to Hermione's achievements, though. After becoming an advocate for house-elf rights, she ingrained herself in magical politics and eventually took over the Ministry herself.
This way, Hermione could do everything in
her power to help keep the world her children grew up in safe. However, the job did put a bit of a strain on her relationships. Being the Minister of Magic is a lot of work and can suck up a lot of a person's time. Lucky for Hermione, her husband and children are kind, patient people.