Disclaimer: All belongs to J.K. Rowling, I'm just playing with her characters.
She watched it come out of the mist. Unsure if she should run screaming, or stand her ground. By the time she had made up her mind, it was too late. She looked upon her fate, and was frozen to the spot. She didn't know how long she stood there, it's breath like a toxic fan in her face, but it felt like forever. She watched, horrified, as it lifted its skeleton like hand towards her. She could hear it sucking in air, no, strike that, sucking in her soul essence, and felt herself start to fall.
A brilliant light came from somewhere behind her, an animal, passed her, and went straight towards her fate, shooing it back to the depths of her mind. When the light was gone, the figure who had cast it, knelt next to her, and picked her up as gently as they could. "We must get you back," she heard them, him, say. Gripping his shirt, she tried to snuggle close to his heart, if she could have, she would have buried herself inside of his very skin. The terror was gone, for now, but it could come back.
She was only fourteen when fate first knocked, since then, she had nightmares about it coming out of the mist, to suck her soul from her body. No amount of Dreamless Sleep Potion could cure it, and it confused her nurse terribly.
On the night of her eighteenth birthday, fate knocked again. Just as before, she was unprepared, and as before he saved her. Only this time, when he knelt next to her, she looked into his eyes, and smiled. "Thank you." He merely nodded before picking her up and striding back to the castle with her limp in his arms.
The rest of the year went on, and although she didn't tell him, she knew that he understood her feelings. She never avoided him like her friends, but kept the respected distance that she knew she should. It would be years still before she would be able to cross that boundary, and he would accept his own fate.
Now in her forties, Fate knocked one last time, except this time, he was standing next to her, helping her fend it off. She didn't fall as before, but still looked into his black eyes. "I wish to thank you yet again Severus. It seems I can never get rid of that Dementor on my own." His eyes crinkled as he smiled, and he replied, "then maybe you should stop tempting fate Hermione."
FIN