This is a crossover!

I do not own any of the characters and I hope you enjoy

Prologue

Little 5 year old Thalia was sitting in her small room trying to block out the noises coming from her mom's room. It wasn't rare that this happened but the only difference this time from all the others was that there was allot more noise coming from the room. Thalia wasn't sure what was happening in the room but she knew her mother was enjoying it from the noises coming out the room. Thalia decided that she had had enough of listening to the noises and decided to go to the small living room which was trashed with alcohol bottles of every kind, with a small TV in front of a two seated ugly, deformed, cream (which used to be white) coloured sofa.

Little Thalia tip toed across the living room, hoping not to step on a broken glass bottle. She finally made her way to the disgusting sofa and sat down, she didn't turn on the TV for she didn't want to interrupt whatever her mother was doing, but at least here she couldn't hear as much and so that was a relief.

Thalia was sat there and nearly fell asleep when all of a sudden there was a loud scream from her mother and then all of a sudden all the noise stopped. This happened allot when her mother's business was finally finished, and the man who was normally in there would soon walk out her Mother's room and leave the house, without as much as a good bye, but normally Thalia would be in her room so the guy would never notice her, but since Thalia was in the living room this time she wasn't sure what would happen.

When Thalia finally heard the door open for some reason Thalia could help but try to blend in as much as she could into the sofa (though it was clearly a failed attempt since the sofa a light cream colour and she was wearing black), but she couldn't figure out why she was trying to hide I mean she's THALIA FUCKING GRACE, DAUGHTER OF ZEUS, why would she be scarred of some man, but even with this statement swirling around in her head she couldn't stop herself. The sound of footsteps travelled through the apartment, and Thalia was finally able to see who they belonged to.

Into the living room stepped a tall, young looking guy with short, messed up, and gelled back, light brown hair.

...

Klaus had just finished his business with some random mortal who he found attractive. When she finally fell asleep in his arms he slowly and quietly got up from the bed and started to dress himself. Once he finally got into his clothes he stepped out of the room and started walking to the exit. The more he walked the clearer it was to hear, a soft beating like a heart, but very soft, not as strong as an adult's so there must be a child in this house. He doesn't remember the blonde who he slept with mentioning a kid earlier in the night, and he was too busy seducing the slut that he didn't hear it at first.

But as he stepped into the littered living room he saw her, a small pale girl with short, pixie styled, black hair, bright electric blue eyes, and a light spray of freckles across her nose and cheeks. She was wearing a dark grey shirt and black leggings, and odd socks on her feet one striped, and one spotted.

She was staring at him, and him at her. Her heart was beating normally, she wasn't scarred of him, and there wasn't an ounce of fear in her face only curiosity. The room was silent, neither of them moving or speaking, that is until the little girl spoke up.

"Hi"

And that's how their story begins.

Klaus POV

He kept coming back, he wasn't sure why, it definitely wasn't for the blonde's company, but it had something to do with the little girl, who he later found out was the blonde's daughter. He found out her name Thalia, he talked to her and she to him, she kept a lot to herself, but he didn't mind it's not like he goes around telling people he was a vampire, and that he wanted to become a hybrid. He knew there was something special about her, he just didn't know what. She wasn't like most girls her age who liked to play with dolls and play dress up, no she liked history and found it fascinating, I tried to tell her as much as I could remember from my time around. She seemed to be very interested in what I had to say. She told me about her and her mother, and the fact she never met her father. She told me how her mother never sent her to school because she thought it was a waste of time. She didn't know how to read and so I taught her, though it was hard with her dyslexia but I got through to her she can now read but it was still hard for her. She also had ADHD and a terrible one too, she could never keep still and it was very amusing watching her on a sugar high.

I was able to spend my time with her for a total of 2 years, but at round March and April it all stopped.

1996 March

Thalia was now 7 years old and her mother was out working, and Thalia and I were in her living, I was watching some television program and Thalia was leaning against me watching it too. we were watching the show when all of a sudden there was a knock on the door. Thalia stood up and went to answer it while I carried on watching the TV show. I used my vampire hearing to listen in on what was happening while pretending to watch the TV.

"Hello?" greeted Thalia

"Hello" came a deep voice, must be a man.

"I don't mean to be rude but who are you?" asked Thalia

"Thalia, I am your father"

"What?" asked Thalia completely stunned

"May I come in" asked the man who supposedly her father.

Before Thalia could reply I was there behind her, and that was when I got a look at this guy. He was tall and had black hair like Thalia's, he was pale, and had the exact same eyes as Thalia, electric blue, I could tell with just his eyes that this was Thalia's father. He wore and navy blue pin striped suit. We looked each other up and down before I moved Thalia aside and let the man through.

"Why don't you come in?" I invited. Thalia looked like she was going to say something but I gave her a look which she understood as 'not now' which she scoffed at but said nothing and walked after her dad.

"So Thalia where's your mother?" Thalia's father asked.

"Working" I answered

"Hmm, do you know when she will be back?"

I looked to the clock on the wall above the TV "soon" I answered. We sat for a while none of us spoke, the TV was still going on but no one was actually watching. Thalia's father was standing looking at the apartment living room while Thalia sat on the sofa watching the floor, while I kept looking at her father, there was something off about this man, I could sense some sort of power radiating off of him, sort of like what he sensed around Thalia only a lot stronger. And then the door opened and we all looked towards where Thalia's mom would be walking through. When she stepped into the room her eyes went wide when she saw Thalia's father standing there.

"You! What are you doing here?" she asked

"I came to see how you two are doing" he answered

I ended up sitting with Thalia on the sofa looking at the TV but not really paying attention. Thalia's father was here, but why did he only show up now?. Millions of questions swirled up in my head, I was so into my thoughts that I didn't realise Thalia was trying to get my attention by poking my side, I did notice however when she pushed me off the sofa.

"What was that for?"

She pointed to something behind me and said "he wants to speak with you" when I looked behind me I saw her dad standing there waiting. I stood up dusted off my clothes and followed him to Thalia's room where he began talking.

"I know what you are"

"Excuse me?"

"Don't act dumb, you know exactly what I am talking about" he had a very angered face.

"If what you mean is the fact that you know I'm a blood sucking monster..."

"Yes that is exactly what I mean, and I want you to stay away from Thalia"

"What?"

"You heard me"

"Why would I leave? Last time I checked you were never there for Thalia and now you show up all of a sudden and expect me to leave?" this guy was all sorts of crazy, I can't just leave her.

"You are a monster and I don't want you near my Daughter. I want you to leave and never come back, and if you knew better you would listen to me, because if I can figure out what you are with only a look must mean that I am stronger than you"

"What even are you?"

"It does not concern you right now, but I know that you think that I am very powerful, and I am"

"Cocky aren't we?"

He just smiled and started walking back, "I'd suggest you saying your goodbyes"

I couldn't believe this I had to just leave her, it hurt just thinking about it but he was right I am a monster. I walked back to the living room where Thalia was still sat fiddling with her fingers. I took a seat next to her and she looked up at me.

"What did he say to you?"

I turned on the sofa so I was facing her, she was still looking up at me with her big blue eyes. I brushed some of her black hair out of her eyes.

"Thalia, I'm sorry but I have to leave"

"What? Why? Was it something he said?"

"Thalia, It was my own choice" I then took her chin with my fingers and her look straight into my eyes and as I began speaking my pupils widened and went back to their normal size. "Thalia, I want you to forget about me and go on about your life as if you never met me" and then I vanished, using my vampire speed, leaving Thalia forever, never to see her again.

Well that was longer than I expected but got it finished. Yay. Well anyway in this story Thalia will have quit the hunters for some reason I haven't thought of one yet but if I do I will include it but yeah, the story actually begins in "know thy enemy" and I will be following the TV show, and it will have been after the wars with PJO and I don't know yet if I'm gonna include HoO yet so yeah thanks for reading hope you enjoy and I'll update soon :D