Cas's eyes widened a fraction as Annabeth shook Sam and Dean's hand. The curly, blonde haired daughter of Athena stood in front of them.
"You need to talk to Chiron, you'll follow me. And stay with me." She said, staring at Dean pointedly.
"What? I didn't do anything." He protested as Sam laughed, covering it up with a cough. Annabeth ignored this as she started walking.
"This is Camp Half-Blood. A place for demigods to live in peace. Or at least stay safe from those who would try to harm us." She explained, giving a side glance at the Winchesters. "Including hunters, such as yourself." She added almost as an afterthought. Cas looked at Annabeth, an odd look on his face as the brothers looked at her in shock.
"What?" Sam asked, his previous laughter gone.
"We've had run in's with hunters before. Never manage to kill us." Annabeth gave a dry laugh and stopped at the front door of a big, light blue farmhouse.
"Welcome to the Big House." The blonde demigod muttered and shoved the front door open.
"Chiron, we have guests!" She shouted to the seemingly empty house, eliciting a roar from the mounted jaguar head.
"Can it Seymour, this is important!" Annabeth growled back at it. Sam and Dean's hands drifted towards the back of their jeans as Annabeth turned towards them and rolled her eyes.
"That's Seymour, Mr. D's pet." Annabeth directed the last bit towards the head. As she was about to speak, they heard a new voice.
"Annabeth dear, what is this about?" An elderly man with a tweed jacket and a scruffy beard. His eyes were tired and sad, and though they had smile lines around his eyes, he was not smile currently. The man entered in a wheelchair, and the moment he saw Cas, his eyes widened in the slightest bit.
"Chiron, this is Sam and Dean. Hunters. And Castiel, the one you told me about after Percy disappeared." Annabeth's voice cracked close to the end of her sentence and she furiously rubbed her eyes.
"If they are here things must be very bad indeed." Chiron said to himself, rubbing his beard thoughtfully. He glanced at his wheelchair and sighed.
"If we are to have this conversation in full, I need to be out of this thing." Chiron made as to get up as Dean glanced at Sam, thinking 'Dude's in a wheelchair. He's not getting out anytime soon. He was soon proved wrong as the blanket fell away and Chiron stood up. Well more so, his torso got taller and then something very odd, even for the WInchesters, happened. A dark brown horse's body started to come out. The pair of hunters stumbled back as Chiron got taller, and was soon towering over Sam, which was new for the younger Winchester.
"So tell me, what is it you wish to know about Perseus?" Chiron asked, staring down at the pair of shocked brothers, then Annabeth, who was used to this, and finally at Cas, the one that nothing really surprised anymore. Sam was the first to speak, shaking off his shock the fastest.
"Can you tell us about Percy Jackson?" He asked. The moment Percy's name left his mouth, Chiron seemed to become ten times sadder. The teacher of heroes beckoned them over to a group of couches as he walked over. Dean and Sam waited for Annabeth to pick a seat, and sat down on a opposite couch. Normally they would've sat with her but damn that girl was scary. Chiron paced in front of them and sighed
"I'll start at when Mr. Jackson killed his first monster." Chiron started telling the story of the day Percy's algebra teacher attacked him.
~Approx. 2 ½ hours later~
"When Zeus found out Perseus was using Percy as a Vessel, it didn't sit well with him. He was afraid that hunters were going to come and try to kill the Camp, like they had years ago." Chiron said calmly, though his eyes were filled with tears.
"Zeus, with the approval of some of the council, decided to banish him to Tartarus. Now you have to understand, we still have no clue how long the angel has been in charge, even though everyone knew, we still wanted him back. And I guess that brings us to your side of the story." Chiron and Annabeth turned to the trio expectantly. In turn, Sam and Dean turned to Cas. For once, Cas had a normal reaction. He gave the Winchester's the look that said, Really guys? Really? But turned to Chiron anyway.
"We were told that someone like my sister may exist so Sam and Dean checked it out." Dean, predicting how this was going to end with Cas talking, took over.
"We spoke to Rachel and Mrs. Jackson, got his name. Then we pulled some strings on our side to get Percy out of hell. But he wasn't an angel anymore. Have you heard of the seals, Lilith, or Lucifer?" Dean asked. Sam was slightly uncomfortable at the mention of Lilith, but got over it.
"Yes, Mr. Winchester. I have. But please, tell me what the seals have to do with my student?" Chiron asked. Annabeth turned towards them, her face slightly tear streaked but now her eyes were stormy.
"When Percy was in Tartarus, he broke one of the seals. One of the highest grace falling to the lowest disgrace. When he falls, so shall it fall. Percy wasn't just an angel, he was a friggin' archangel." Dean said, rubbing his face with a hand. Annabeth sat back unsurprised and did Chiron. Then Sam said told them what happened.
"He was turned into the most powerful demon in history."