Battle
Minutes after the final battle, Hyacinth Potter dashed to the Shrieking Shack, intent on saving her saviour.
Hours after the battle, Hyacinth Potter sat next to the bedside of the irascible 38-year-old, entirely focused on ensuring he was perfectly healed.
Days after the end of the war, Hyacinth Potter sat next to Severus Snape in court and asserted his status as a spy for the light and the reason she was able to end the fighting.
Months after things settled, Hyacinth Potter had become a regular companion to Hogwarts Headmaster Severus Snape.
Years later, Hyacinth Potter and Severus Snape were wed.
Being the Mistress of Death came with unexpected consequences for the young teen. For example, her power had not stopped growing as it did for most wix at the conclusion of their magical maturity on their eighteenth birthday. She had become, in just a few short years, the most powerful magical on the planet.
The Deathly Hallows refused to part from her. She loved her cloak, but the presence of both wand and stone on her bedside table the morning after the battle - and every morning after she attempted to lose, break, or otherwise get away from them - frustrated her. That is until she finally had the stone set in a pendant she could wear around her neck. Once the strangely sentient artefacts recognized she had given up trying to get rid of them, the wand had lain docilely on the table next to her faithful Holly wand. When she woke up in the morning, Hyacinth had found a strange new wand, an amalgamation of the two, and the sense that the wand was hers and would remain so forever.
Hyacinth was infertile. Severus took her to Poppy when Hyacinth realised she hadn’t gotten her period several months after the battle. He had calmed her panicked state, but had been forced to console her when the mediwitch confirmed the truth. The diagnostic conclusively proved Hyacinth’s infertility. It was a blow.
But perhaps the worst thing was the discovery that she was no longer ageing. Though Severus was no longer a spy, he retained some of his more paranoid practices, and one of these was casting a full diagnostic upon himself once a month. When he and Hyacinth got married, he expanded his practice to include her, and after months of too-similar readings, took her to the goblins for a magical blood test.
Griphook’s office was destroyed.
Along with every other office in a fifty-metre radius.
It was good they were underground and goblin magic was not like wizarding magic. Thankfully no one was hurt. The goblins had claimed them both as Warrior Friends and provided Hyacinth access to the long forgotten Peverell vault. The two spent hours going through the thing once Hyacinth had come to -shaky- terms with her unwanted immortality.
Hours before the end of the battle, Severus Snape found himself facing down Voldemort and his pet snake.
Moments before his death, Severus Snape looked into swimming emerald eyes and said, “Look at me,” even as the girl emptied bottle after bottle of potion down his mangled throat.
Minutes after the final battle, Severus Snape discovered he was not in the Shrieking Shack, but Hogwarts’ infirmary.
Hours after the battle, Severus Snape grumbled in his usual irascible manner at the girl who refused to leave him alone.
Days after the end of the war, Severus Snape sat next to Hyacinth Potter as he was declared a hero.
Months after things settled, Hogwarts Headmaster Severus Snape was questioning his sanity in allowing his solitary life to be upended by the presence of a single, infuriatingly beautiful witch.
Years after, Severus Snape and Hyacinth Potter were wed.
Their relationship was not without its problems. The wider wizarding world was confused by them, and regularly expressed their displeasure in the form of howlers, letters to the Daily Prophet editor, and even physically accosting the couple in the street. And the first time Severus had cast a diagnostic at Hyacinth and the two discovered she was infertile had been heartbreaking.
Their relationship was not without its charms, either. Hyacinth loved living at Hogwarts and teaching Defense. Severus enjoyed the increasingly strange ideas Hyacinth came up with to rid herself of stubborn semi-sentient artefacts. And the couple enjoyed an active love life which saw Winky, their personal house elf, shaking her head more than once when cleaning the master and mistress’ suite.
But things were not perfect; the most glaring example of which was the strangely similar results Severus got when performing his usual monthly diagnostic on his wife. After a few months of the exact same information, Severus was concerned. So he and his wife went to Gringotts for a magical blood test.
The results were explosive.
Thankfully, the goblins had not required the wizarding power couple to pay for damages.
It took weeks for the two to come to terms with the situation. Hyacinth was physically seventeen and would remain so. Forever. Severus was forty-five and would continue to age. And eventually die. It was the worst blow their marriage had ever received. But they persevered and returned to Gringotts to explore the Peverell vault.
Which was where they found a journal from the very first Peverell to unite the Deathly Hallows, Ignotus’ second child, a daughter, Aveza. She had discovered her Hallows-induced infertility and immortality and lost her mind. The end of the tome was written by the woman’s caretaker and detailed exactly how she called the spirits of the dead, left the cloak locked in a trunk sealed by the wand in her father’s house, and went out to challenge everyone she could. Eventually she got her wish. A duel ended poorly and without the combined power of the Hallows, Aveza succumbed to her injuries and once again the wand was lost to the bloody pages of history.
Hyacinth could empathise, but gripped her husband’s hand like a lifeline reading about her long ago ancestor’s death.
Severus, on the other hand, discovered a treasure trove of knowledge which had been lost for centuries.