Disclaimer: I do not own Harry Potter or it's characters, this is merely a work of fanfiction.

A/N: This was a prompt by "dancerkr". It is a fem! Harry x Regulus. I know I have several other prompts to work through, but this just popped in my head. I will try to work through the other prompts as I am able. Hope you enjoy :)

Henrietta clutched the Elder Wand in her hand. She wore the Resurrection Stone set in a gold band on her hand. The Invisibility Cloak hung down her back, the pouring rain forcing it to cling to her form.

The cold sea air was a tempest around her, but she stood high above the crashing waves. She could feel the chill all the way down to her bones.

She couldn't save everyone, but she could do this.

So many had died, so many slaughtered because a mad man made some horcruxes. This could have ended this ages ago, if her family had possessed the Deathly Hallows. Her father could have ended it before her, or his father before him.

It was their right, their responsibility.

The Mistress of Death- High Lady of Death- Lady Peverell- Lady Potter- call her what you might, Henrietta had always known she was different. It was always her that was singled out, her that was called on to save the day, and yet she had somehow evaded death every time.

She understood now that she had not evaded Death, he had merely allowed her to continue to live. It was not her time, and Death would never take a Potter before their time. They were his descendants, his beloved ones.

Her parents' young passing was tragic, but they had given their lives in exchange for hers, a trade Death was willing to accept.

There was something of her heritage in her visage. Her skin was pale white, and her hair was the red of freshly spilled blood. Her eyes shone a bright emerald green, except for in candlelight when they tended to give off a gold shift. She had always been slight of build, an effect of barely being fed by the Dursleys. She looked sprite-like.

On her ribcage the initials RAB laid in elegant script- Regulus Arcturus Black. The name had played on a loop in the back of her head throughout the war. To finally find the name of her soulmate, only to learn he had disappeared during the first war had been heartbreaking.

Henrietta felt the sting of the sea air against her cheek, and focused her magic. She spun on her heel and apparated to the entrance of the cage.

She was tired, so tired, but she couldn't rest until this was done.

The entirety of the wizarding world was celebrating her triumph, or mourning their loved ones, and she was here.

Blood still covered her, and mud was stained down the front of her robes. It didn't matter, this was more important. Hermione had given her a hug and a nod, and sent her on her way. She knew what she had to do, and that she had to do it alone.

Henrietta made her way to the wall that she had entered long ago with Dumbledore. She cut her hand with the Elder Wand and painted the blood along the cave wall.

It opened easily, and Henrietta was surprised that dread did not overwhelm her. She had seen her once great mentor tortured here, but the cave no longer seemed so scary. Not with Voldemort dead, not with Death on her side.

He would not take her early. She was destined for this.

She cast a Lumos Maxima that crested at the top of the cave and hung there like her own personal sun.

Death himself had told her how to work this spell, when he met her in the facsimile of King's Cross Station. It was arcane magic, the likes of which had not been used in centuries.

Death had refused to take Regulus Black when he was pulled into the lake by Inferi over a decade ago. He knew one of his beloved's initials rested on the boy's body, and refused to take him from her. So Regulus stayed in that lake, neither dead nor alive, in a purgatory, preserved by powerful magic.

Henrietta took a deep breath, and took a moment to cast a drying charm on herself. Some of the chill left her, but the soreness from battle still racked her body.

That was good, she thought, that was fair.

So many had sacrificed so much, the least she could do was bear with some sore muscles for a few days. She flicked her wand and felt the pins in her hair collect in her cloak pocket, and felt her long red hair fall down her back.

She would present herself to Regulus with her hair down, a great honor. One reserved for one's husband or child. Her hand still bled, and she held it out over the lake, allowing it to drip into the water. She gripped the Elder Wand in her other hand and spoke the words Death had taught her.

The water began to ripple, and waves began to crash the shore.

A figure began to walk towards her out of the shallow water. As he approached, the water stilled behind him until he stood in front of her on the rock and the water was still once again.

Henrietta dried him with a silent charm, and he stared at her like he was seeing light for the first time. Who could this be? She looked like Lily Potter, but no, not quite. A sister perhaps?

"Who are you?" he asked. His voice was hoarse from lack of use, and he sorely missed the loss of his wand. It had fallen into the lake, and he dare not disturb the water again.

"I go by many titles, but my true name is Henrietta Lilian Potter." Regulus gasped, those were the initials that had laid on his wrist his entire life. The initials of his soulmate He never actually thought he would find her. Part of him was convinced that he didn't deserve someone to love him so unconditionally.

Yet, here she was. She had saved him. He swept her into his arms.

Henrietta relaxed in his arms. It felt like coming home. She thanked Death that he had allowed them to find each other. Regulus suddenly realized that his hands were laced through Henrietta's long red curls, and made to pull back, but Henrietta just held on tighter.

"I took my hair down for you, Regulus."

Regulus sighed in relief, and sunk his hands deeper into her curls. Relishing the feeling of comfort she provided despite the circumstances. He wasn't daft, he knew something was wrong, terribly wrong. She was covered in blood and dirt.

Not to mention, when he had come into this cave, there had been no Henrietta Potter that he was aware of. He had been made to memorize all Pureblood family trees by Walburga.

There was the distinct chance that this was the daughter of Lily and James. He recognized the golden shift in her eyes.

How long had he been in the water? Why hadn't he perished?

He had so many questions and yet, in this moment, he could do nothing but hold his beautiful soulmate in his arms, and soak in her warmth.