A/N
This book will be mostly in Lily's perspective when it isn't it will say who's it is.

     "You have to go back and see what these amazing demigods are doing with the world" my father's voice boomed.
     "Father, I can't" I replied
     "Why?"
     "I've heard that there are legends about me and if it gets out that it's me I'll never hear an end to the questions." I said.
     "I'm not saying you have to go to the Camps and I'm sure no one will remember what happened when you were six." He said.
     "The party" I replied.
     "I'll think about it a little more," he said, "quickly pretend to be a servant your brother is coming."
     "Would you like anything to drink Lord Hades" I asked.
     Nico walked in. "Sir would you like anything to drink?"
     "No, I must speak with my father in private." He said.
      I looked at my father. "Off with you servant," my father said. I quickly walked out of the room.
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Nico's POV
     I had to ask my father about something, it was about Chiron had told me. I know, I should just know it's a legend and stop thinking about it but Reyna had told me a similar one.
      I started to think about the one Chiron told me:
      One night a little girl showed up at Camp Half-Blood, she looked no older than 5. Chiron took her to the big house and asked her what her name was.
      "Lily" the girl replied.
      "How old are you?" Chiron asked.
      "Six" the girl answered.
      Chiron let the girl stay and gave her training  because if she could get in she was obviously a demigod. She was the best fighter in the whole camp and no one dared to challenge her but Luke (who was the best sword fighter in 100 years) she beat him easily. Lily only stayed at the camp for 3 days and then she disappeared after a Hellhound attack. Most people forgot about her or pretended she wasn't real.

Then I thought about the version Reyna told me:
One day a six year old girl came to camp. She joined the fifth court and was the best fighter in the legion. After a week there was a Hellhound attack and she disappeared. Jason quickly forgot she existed even though he was the other praetor. Reyna never forgot.

While I was almost to the throne room I heard whispering and then I heard someone (probably a servant) ask "Would you like anything to drink Lord Hades?"
"No I'm fine right now." He said. I had never heard him be so kind to a servant.
As I stepped into the throne room the servant asked me if I wanted anything to drink
"No, I must speak with my father in private." I replied.
The girl looked at my father for dismissal. "Off with you servant," he said. The girl quickly walked out of the room, as she walked away I saw something on her arm. It looked like Hazel's SPQR tattoo.

A/N
Do you think Nico's going to find out he has another sister?
I just want to say that I don't own any characters except Lily and a few others that will show up later. I also own the plot so please ask me before using it.
Thank you I hope you like my fanfic!!