Harriet had always known she was destined for great things: from the first day she learned she had magical powers, she knew she would make her late parents proud.

But after losing all of her family and friends, she began to doubt her abilities. Having spent six years of her life fighting the same monster had made her tired, weak, and aware of her mortality. Would it be easier to just drop everything and let him rule as he pleased?
She had a huge weight on her shoulders - to save the magical world. But how could a 16-year-old girl be expected to achieve what many talented wizards had not dreamed of accomplishing?

From the moment she learned of the prophecy, she knew she would have to die - that she would have to sacrifice her life to save the lives of others. And while a selfish part of her only wanted to run away, hide, conceal herself and let go, she was also aware that she would never have a clear conscience if she let her friends and loved ones die.
The Weasleys, the Grangers, and many others who had welcomed her into their family would lose their lives if she ever decided to let them fight Voldemort without her help. "And one will have to die at the hand of the other, for neither of them can live as long as the other survives.
A few sentences, a simple grouping of words, had been enough to destroy her future as well as her family.

That's why Harriet Potter had to act.

That's why Harriet Potter found herself in 1943, ready to destroy Lord Voldemort.