Castiel was on the pier, leaning against the railing. Footsteps sounded behind him and he spoke.
"You shouldn't have come Anna." The angel said, not turning around. His gravelly voice made the newcomer laugh.
"Oh Castiel, it isn't Anna." Percy said, crossing his arms and grinning. Cas spun around, his usually emotionless face covered in an array of emotions.
"Perseus. B-But how are you here? I thought Michael banished you." Percy shrugged.
"Well, he did. And I lost my grace of course." Percy sighed and looked at Cas with a little half smirk. "But I was reborn into the Greek Pantheon as a Son of Poseidon." He said casually, as if they were just two buddies hanging out at a bar. Cas tilted his head and calmed down in the slightest.
"You aren't an angel anymore. What happened to you?" The trenchcoat wearing angel asked. Percy stretched and continued with his story.
"Have you heard of Percy Jackson?" He asked. Without waiting for an answer, he plowed on. "That's this body. My one true Vessel." Percy said, gesturing to himself.
"After the Greek and Roman war with Gaea, the Olympians found out what I was. And threw me into Tartarus." Percy sighed and stretched. "They broke a seal Cas. You know the one, One of the highest grace falling to the lowest disgrace. When he falls, so shall it fall."
Cas looked at Percy for a moment and his eyes widened. "They made you a demon." He said slowly.
"The most powerful. And as you can imagine, when Lucy heard about this, he was not pleased." Percy grinned, one that Cas had never seen on his face before. Percy's eyes flicked black as he looked at Cas.
"I was tortured for quite some time downstairs, but then my dear friend Lilith showed up and saved me from that terrible torture Alastair put me through." Percy said, very sarcastically.
"Lilith and I are besties now." He said and Cast backed away. Percy rolled his eyes. "Cas, I'm not going to hurt you. And you need to know something." Percy's calm, relaxed demeanor rolled of fast.
"I'm playing both sides. I will tell you all the plans, but I will also have to tell Lilith some of your. I will blur them a bit, but I will have to." Percy's eyes darted around as if he was being followed. "See you soon little brother." He said before disappearing. Cas glanced around, no trace except the faint smell of sulfur that Percy was ever there.
"So you're telling us, Percy was there and you didn't catch him?" Dean asked, his voice raised. Cas sighed.
"Dean I told you. He is going to work both sides. You need to trust him." Cas said, his eyes pleading with Dean.
"Trust him. Sure." Dean said, walking to the bed and sitting down.
"Dean, he's my brother. One of the closest to me. Wouldn't you do the same for Sam?"
Dean's retort died in his mouth as he glanced over at Sam and sighed. Cas looked around the room, at the weapons on the table, the holy oil on the bedside table, and the demon warding on the inside of the doors and windows.
"All I ask is that you give him a chance. Please." Cas asked, standing up. Sam looked over at Dean and shrugged. Dean let out a breath in frustration.
"Fine. But the second he crosses us, he's dead."
"Of course. Now if you'll excuse me, I have to go." Cas said, and with the flapping of wings he disappeared.
"Cas, wait! We need your help with Lili- Aaand he's gone." Sam, sitting back down by his laptop and putting his head in his palms.
~~Somewhere else~~
"Lilith, I agreed to help you free Lucifer for two reasons. One, because I need to have a chat with my brother. And two because I don't have to hurt Cas. And I know you are the final seal." Percy said as he walked along side the blonde demon, passing cowering demons every few feet.
"And I intend to keep the promises I made you. But we need to get through 54 more seals before they can kill me, or else it will not work." She told him. "And did you speak to your younger brother?" Percy nodded. "You know I'll work both sides." The brown haired demon walked up next to them and glared at Percy.
"I'm actually helping Lilith, Perseus." Ruby growled as the walked. Percy rolled his eyes at them.
"So am I Rubes. We're both helping her get killed!" He said cheekily, patting her head. She swatted at him.
"As long as Percy helps you trick the Winchesters into killing me, we are fine." Percy laughed and stuck his tongue out at Ruby and she growled.
"Would you two stop? We have work to do." The white eyed demon said, exasperated. The other two nodded and went off on their separate missions.