Your POV

 You were casually strolling through the courtyard of your boarding school when it appeared. It looked like a bull/human, standing not far away from you. It was very ugly. You tried to recall its name from history class, but you were ADHD and dyslexic, so you couldn't. Min-something? You didn't know. 

 Then the chariot appeared in the sky. You were so surprised. You could see in it a blond girl and a boy with black hair. They were coming down in your direction. They parked the chariot in front of you, then got out and ran toward the thing. They had- wow, were those swords? They stabbed the bull man, back and forth, until it died. 

 Honestly, you weren't paying attention. You were staring at the golden chariot, which had pictures of the sun and musical notes on it, and at the pegasi that carried it. One of them was completely black, and the other was grey with white spots down its legs. You stared in awe. They had a huge wingspan, and they looked like they were from another world.

 Which they probably are, you thought.

 After the battle, the boy and the girl turned to each other.

"Another Minotaur killed for my collection," said the boy, who appeared to be about seventeen.

 The girl shook her head. "Brag later, Percy. We're here for the new demigod."

 They turned and started walking back towards you. Or at least you assumed they were coming for you. Yep, they were.

 "Hi, I'm Annabeth," said the girl to you. "That's my boyfriend, Percy. What's your name?"

 You felt suspicious, but you answered. "Y/N L/N. Nice to meet you Annabeth. And Percy." You nodded towards him. 

 "We're here to bring you to Camp Half-Blood," Annabeth said. 

"Because congratulations! You're a demigod," Percy finished for her. 

 "W-what? I don't even know what that means," you said.

 "Just hop into the chariot and we'll explain everything," Annabeth said. 

 Deciding to trust her, you got into the chariot and sat next to Annabeth.

 In the air, they explained it all to you. You figured your godly parents must've been a male, because you knew your mother.

 They touched down onto Camp Half-Blood. The second you were out of the chariot, everyone was staring at something neon green on top of your head. 

 Percy had a huge smile on his face. "Looks like you're my half sister," he said. "Y/N...sorry, whats your last name?"

 "L/N," you told him. 

"Right. All hail, Y/N L/N, daughter of Poseidon and my half sister."