My little sister ]Percy Jackson x Sister reader

7}"Capture the flag! More like Claim your Children"

Percy's Pov

Once it was time for capture the flag Annabeth came over to me and y/n " y/n don't you have a sward" she asked her "yes but I am not playing I am simply going to read my book over by Mr. Chiron and Mr. D have fun Percy she said before running over to them and sitting by Mr. D Annabeth than dragged me over to where

 her team was playing " Ok Percy I want you to be on border patrol" she said I nodded I looked at my surroundings I was by a lake and by the flag. I was day dreaming and not listening to what Chiron was saying about the rules and when the whistle bowed we started playing. Everything was going fine until Clarisse and her buddies came over to me 

" well what do we have here" she started she looked at her brothers and said " get him" I was about to run until someone tripped me and then they started attacking me long story short we won, I was in a lake and I broke Clarisse's sward. " You set me up you knew they would come after me" I screamed at Annabeth 

" hey what did I tell you Athena's cabin always has a plan". she said I started making my way out of the lake when Annabeth stopped me "wait Percy stop get back in the water" "why" " just get back in Chiron watch" 

she said as she pushed me in then I noticed all the cuts and bruises started to disappear " oh no this is not good" she said " what's not " I was cut off my multiple gasps turns out though they were not looking at me they were looking at what was above my head.

It was a blue trident that was now fading away I looked over at everyone " All hail Percy Jackson son of Poseidon Earth shaker, Storm bringer, Maker of Horses Everybody started kneeling and I thought that I was going crazy until everyone got up and turned to look at y/n " How come she was not claimed Chiron, Percy is her brother"

 Annabeth asked " I don't know child but it doesn't matter Percy you will be moving into cabin 3 get all your things from cabin 11 you will be moving tonight" he said I looked at Annabeth Like she was crazy. " what about my sister I'm not leaving her"

 I looked over at y/n she looked like she was about to cry. I knew she felt like she was being abandon once again first by dad than mom and now me " She can't move in with you Percy until she is claimed and who knows she might never be" Annabeth said " Rules are Rules". 

I knew they did not know what they were talking about they did not understand they did not have younger siblings. "y/n no she doesn't mean that" 

Then y/n's hair and eyes started to glow and she took of running back to the cabin as fast as her little legs could take her " Percy I am sorry " "yeah I am to Capture the flag more like claim your children" I said to Annabeth.  " you should probably go talk to her 

I think she would understand" "yeah she would but no one else would understand" " why I would" " It's not like that my I made a promise to her when she was 2 that I would stay with her no matter what" " I still think you should talk to her" " I guess" I said.

Y/n pov: 

I can't believe him, I trusted him, He was suppose to stay with me not leave me like whoever my dad is now I don't even know " I am so stupid" I whispered to myself sure I might only be 4 but I know how it feels to be left alone Percy should know that sense he is well 

"was" the only one I have left.  I didn't even notice that I was crying until I felt it go down my face to my hand.  Then I got an Idea Will said that he was a son of Apollo maybe I could visit him. No maybe not I think I will just go for a walk. 

" I wish mom was here she would know what to do I feel like I have no family anymore I already had no friends at school. Than it hit me " I left my book" I said to myself and walked back to go get the Book again from where I was sitting. once

 I got there I saw something there more like someone but It was only one person out there everyone else went back to there cabins and the fact that Percy did not even come looking for me to comfort me makes me upset. I knew 

this was wrong but I did it anyway. I sat down next to the person surprisingly they turned to look at me and gave me a warm smile and I smiled back " you know" They started " Your the only person in this world to ever took being abandon pretty well" They said " What does that mean" I asked " Let's face it y/n" they turned

 back around to watch the sunset with me, how did they know my name " You are special you are not like any of your peers your kind, and understanding anybody would be lucky to have you as a sibling" " not Percy he obviously

did not care he left and went to the Poseidon cabin anyway he didn't even try to find me" " Ah but that is were you go wrong" the stranger finally turned to look at me. I finally saw what they looked like but I was shocked because they looked like looked like someone I already knew.

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