Okay so this is going to be a kinda sorts series of short cross over song fics based around a few of the songs from the Rock Opera, Repo! The Genetic Opera, there will be only one OC, but Snape will be the primary character in this, I own neither Harry Potter nor Repo! The Genetic Opera.

This chapter will be based around the song Legal Assassin.

Severus stood at the bare grave site. The sound of taunting accusing voices tormenting him in his mind. "Monster!" they cried, "killer, Severus, Murderer, Demon, monster, killer, Severus, murderer, demon, legal assassin." The voices overlapped each other in a chaotic jumble until one voice repeated one word over and over as he stared blankly at the Grave of Lily Potter.

"Severus, Severus, Severus, Severus…"

He shook his head, it killed him to come here, but he needed to think. What? He strained, what did he need to think about? Shiloh, his Little Shiloh. Well not little any more. Seventeen. One year before Harry's birth Lily had another child but the child's father was not James Potter.

And two years after that Severus was left alone with a baby girl named Shiloh Lily Snape, and she bore a horrible cross. She could never leave the house, ever. Shiloh had been born with a rare disease called Xeroderma pigmentosum, or Photosensitivity. She could never be exposed to any light stronger that the Lumos charm, or else she would begin to break out into sores and blisters, and it would eventually be fatal.

Over seventeen years, Shiloh began to grow increasingly distant from her father, moody, and secretive, he brushed it off as Teenage Hormones, but still…

And his re-involvement in the Deatheater Movement, making him equally secretive didn't help anything, he needed to talk to someone he trusted completely. Kneeling at the head stone he lay a bouquet of roses on her grave and stayed there for a few moments. "Where did our little girl go?" He asked to his dead friend, expecting no answer and receiving exactly that, "It's me she must escape."

"My burdens I can't erase" he stood in the still autumn air, "And the mother I might have saved". The voices came back to him with fury, "Evil! You're a monster!" they screamed at him, he flinched at his own demons like someone hit him. And sighed staring at the name engraved on the headstone, "Lily I need you here." He begged, "Just look at what I've become, the nightmare that she should fear is the father you left alone."

The demons came at him again, "Assassin! You're a monster!" they attacked him, and he forced himself to flee into his memories. "The years roll by without you Lily, seventeen have come and gone." He sat on the ground and rested his head in his hands, "I raised our Shiloh with the best intentions." He looked at the grave like it was her, like she was there with him, listening. "But there is something I can't tell her, I am lost without you here. And I am only living out a lie."

He imagined his daughter, she looked just like her mother, she had long ginger hair and emerald eyes. The only thing she got from her father was his nose, thin and hooked, and his brilliance but even that he claimed was all her mother. "Shiloh can never leave." Severus said firmly, "She is my everything, and nothing can bring you back, and she is all I have left." The voices were back stronger, jabbing him at all angles, and scream things he knew but didn't want to.

"Monster! Killer! Demon! Murderer!" the words tore through him, he knew he was being selfish with Shiloh by never letting her out, even at night. But he needed to keep her safe, out of harm's way, and she was safe in the house away from the world that he was a part of. "The years roll by without you Lily, Seventeen have come and gone." He smiled a little, "I raised our Shiloh with the best intentions."

It was true, he had kept her safe from the world and watched her grow into a beautiful woman. He homeschooled her and taught her everything she needed to know. She had a wand, of course. He had taken her to Olivander's under cover of darkness, and he schooled her in her room during the summers. And the whole time she never knew of her father's past.

"But there are some things I can't tell her" he sighed, "I am lost without you here, I am only living out a lie." He closed his eyes as the demons attacked once more but this time he didn't flinch at their jabs and blows. This time he let someone else take over, a sort of Mr. Hyde if you will. The cold, cruel, heartless persona he wore over his skin to keep him from going utterly mad as he carried out orders for both light and dark.

"I'm the Monster." He slowly stood up, "I'm the villain" he smiled bitterly, "What perfection." He pushed his hair back, "What precision" he chuckled, and a slow fiery rage filled him and his voice lowered to a menacing, cold, gravely growl. Like that of an animal. That's what he forced himself to become. That's what one needed to be when you worked under the keen eye of the Dark Lord.

"Keen decisions, I will carry out my orders, I deliver information. I am the evil, the legal assassin."

As soon as he finished speaking the words he felt dizzy, like you do when you stand up to fast and the room starts to spin. The chill in the air snapped him out of his trance and he looked around, it was late, midnight at least. Severus checked his watch three a.m.; He had to get home.

Unfortunately Severus had been saddled with Pettigrew and he had given Shiloh permission to use any semi-lethal spell she wanted if he made her uncomfortable. He looked around him before Apparating with a loud snap and arriving inside the door way of his house. He looked around to see if anyone was in the parlor before removing his coat and hanging it on the hook.

He froze when he heard movement in the living room and drew his wand slowly, think it was just Pettigrew waiting for him to see why the potions mater was out so later he muttered, "Lumos" the room became dimming Lit and He saw the thin shadow of the pale wispy girl laying on the couch waiting for her father to come home, dressed in a black set of night clothes.

"Daddy put the light out!" she gasped and shaded her squinting eyes, Severus quickly did so, "what are you doing up?" he asked and lit one of the several candle sticks in a brass holder they kept about the house. "I was waiting for you to come home, I got worried." She explained and blinked a few times so the spots that danced in her eyes would fade.

"Well I'm home, now get to bed." He lit another candle and handed it to her carefully, "Where were you?" she asked, "out." He stated plainly, she paused a moment and looked at him sadly with large deep set eyes, "You were with mum again." She nodded and her father paused mid-step. The air grew thick with tension until Severus broke it stiffly with a simple order. "Get to bed."

Shiloh nodded and turned for the stairs, "Night dad." She said softly as she made her way up the stairs and turned to glance at him a moment before entering her room and locking the door behind her. Severus listened for the sound of the lock snapping before relaxing his muscles and heading to bed himself.

Alright the next chapter will be up soon, P.S look up the illness Shiloh has, It's a real thing.