In the AU Thalia and Jason are twins
Au Percy POV
I was interrupted from my music when Percy decided it was a good idea to make tricycles. He pulled the one earbud I had in and said "Who are we going to ask? It's our turn. At first, I couldn't figure out what the hell he was talking about, then I realized we were playing truth or dare. "Jason." I told him.
Nico took the earbud from me and took the other end out of his own ear. "Truth or dare, Jason?" me an Percy both asked at the same time.
"Truth." Both Jason's said. With out thinking I countered with "List all the Pros and cons of Reyna and Piper."
"Lets start with Pros." our Jason said. Now that they sat next to each other, I noticed how different they looked. Our Jason had black hair and looked less mocho than their Jason. Also, their Thalia and Jason looked nothing alike. How were they twins?
"They're both strong..." our Jason started
...and beautiful..." Said their Jason
"...and brave..."
"...and powerful..."
"...and smart..."
...and commanding."
"Now the cons." I prompted "Start with Piper."
"uumm..." They said in unison.
"She...uh...er" Their Jason began "t-talks a lot."
"Oh!" their Piper said with an undertone of I will kill you. "I see how it is! So you want to have sex and that sort of thing but I talk to much for you to get laid!" Our Piper would never say that.
"NO! Pipes, you know full well that's not what I meant." Their Jason said.
"Don't 'Pipes' me! and if that's not what you meant the explain yourself!"
"I mean to say that you charmspeak me too much!"
"Well you could have just said that! I can fix that." Then she began muttering things like "Moron" and "Talk too much"
"Reyna's turn" I said enthusiastically
"She's a little too cold and unwelcoming." our Jason said and then he sprinted out of the room to avoid getting killed. I smiled. This was turning out better than anticipated.