Author's Note: Good News, I think I will be able to update on the weekends pretty regularly depending on my homework workload level. General spoilers for everything up to season 8. Also, this is definitely AU because Cas will have his angel abilities. I want to thank DemonSkitty and ArtistKurai for their recent comments and support. And thanks again to every reader!

Dean laid unconscious in his brother's arms and was as pale as the moon. Sam's eyebrows were furrowed as he looked concernedly at his older brother's grim state.

Looking up at me, he pondered aloud with a voice on the verge of panic, "Why is he still so pale?"

My heart filled with empathy towards Sam. I knew what it was like to have someone you love look so deathly. I reached out and touched Dean's forehead and his skin felt cold.

"The scale did its job, but Dean has lost a lot of blood. He just needs to rest for a while."

Sam nervously looked between Dean and I, but there was something missing from his reaction. Something different in the way he held Dean, as if it wasn't the first time.

I tried to comfort him by saying, "It's going to be okay. Dean seems like a strong guy. I'm sure a little blood loss isn't going to keep him down for long. We should move him somewhere he can rest and heal."

Sam nodded, his eyes unfocused. Then he looked at me with a sly smile and said, "I have a better idea." He closed his eyes and suddenly I heard a whooshing sound and a man appeared beside Sam.

"Sam, what is wrong with Dean? You said he is in trouble?" The man was wearing a trench coat and spoke with a gruff, deep voice. His eyes were filled with worry as he looked at Dean in Sam's arms. Then he noticed me in the tub and anger broke through his face, "Who is she? Did she do this?" The man took a few steps towards me with murder in his eyes.

Sam stopped him before he could hurt me, "Cas, she didn't do this. Leave her be."

I backed as far away as possible, thankful that I was still in this form in case I needed to defend myself. "Who the heck are you?" I asked, my voice much higher than I meant it to be.

They both ignored me, Sam directing all his attention to the mysterious man. "Cas, Dean lost a lot of blood and I was wondering if you could… you know do your forehead touch thing."

Cas frowned as he crouched down next to Sam and Dean, "What happened here?" He pressed his three middle fingers against his forehead and Dean's eyes shot open, his face returning to its original color.

"Cas? What happened?" Dean mumbled as he sat up, rubbing his temples like he had a headache.

"You lost a lot of blood and passed out, so Arrie put her scale on you and it healed, but you had lost too much blood, so I prayed and Cas came and healed you." Sam managed it all in one breath, relief washing through him.

I decided I better put my plan on hold until this Cas guy leaves. I don't want anyone involved that doesn't have to be. I just hoped his appearance didn't ruin everything I was hoping would happen with the Winchester brothers. Truth be told, I knew a lot more about the Winchesters than I had let on before. I didn't connect the dots that these Winchesters were the same guys who had almost started and successfully stopped the apocalypse, until I was already stuck with them. At this point, I knew I either had to have them on my side, or run like hell as far away from them as possible.

Cas helped Dean stand up and Dean started examining his forearm and was amazed that there wasn't even a scar. "Impressive." He said absentmindedly.

Cas continued to look at me wearily, and I avoided eye contact because there was something off about him. He definitely wasn't human, and I had a hard-enough time dealing with those. "Who is she?"

Sam started to answer, but I cut him off, "My name is Arrie and as you can see I am a mermaid." I stretched my hand out to shake his, but he just stared at it so I quickly recoiled. "And what are you… Cas?"

His eyes narrowed and he stood a little taller, "It's Castiel, and I am an angel of the Lord."

My jaw involuntarily dropped, "An angel?"

"Yes. Of the Lord." He corrected.

I had heard of angels before and have long since knew of their existence, but had never been face to face with one before. I must admit he wasn't quite as holy looking as I had envisioned. "So the rumors are true, the Winchesters have an angel looking over them. Here I thought it was metaphorical."

Dean cocked his head a little, "I thought you said you hadn't heard of us."

"Well, what would you have done if the world's best hunters were threatening your life? I did what I had to do to keep Nerin safe."

Sam nodded, "If you have heard of us then you know that we will kill you if you're lying to us about anything."

"Come on Sam, can't you see I am just a mermaid? What am I going to do? Splash you to death?" I changed my mind and decided to use some of my powers on Sam. I was originally just going to let nature take its course, but if Sam wasn't going to cooperate with my plan… then I would just have to make him.

"I believe her." Sam was suddenly smiling as his mood flipped from weary to total ease. Damn it. I hated it when my effect on men worked too well. It made it harder to conceal. Hopefully the angel wouldn't notice.

Dean and Cas both looked at Sam, but Sam wasn't paying them any attention. He began to look at me like a love-sick puppy, that is until the silence became awkward.

"Sammy?" Dean asked. Clearly aware that something was indeed off.

Sam snapped out of it and looked back and forth between Dean and Castiel before shrugging his shoulder, "What?"

"You okay?"

"Pfft… Yeah. I am fine. Why?"

"You trust her?"

Sam looked back at me, and I gave him my sincerest smile, "Yeah. I don't think it would benefit her to lie to us. If she had any powers, I think she would have used them against us by now."

Dean nodded seeming to accept his brother's answer for the moment, but Castiel didn't seem convinced. He continued to glare at me like I might sprout fangs and lung at him at any moment.

"So now that that's settled. How about you all give a girl some privacy?"

That made Castiel blush, and look away as if he realized that I was somehow naked even though I was still in my aquatic form.

"I am going to be waiting just outside the door, so don't do anything stupid." Dean threatened.

"Yeah, I know if I try anything I will be sleeping with the fishes. I get it."

Dean smiled a little as they all left the room.

I sighed and sunk my head under the water one more time, appreciating its warmth and the sense of security it gave me. Then heaved myself out of the tub, trying to avoid the puddle of blood left by Dean.

I heard yelling outside of the door and instantly began to worry about Nerin. It only took a minute for my legs to return, and I changed as fast as I could into my jeans.

I exited the bathroom, expecting to find Dean awaiting to escort me down the dining hall, but no one was there.

I rushed down the hall into the kitchen, and found Sam standing there running his hands through his hair anxiously.

"What happened?"

He turned around and looked glumly at me, "Nerin… he is gone."

Secondary Author's Note: Thanks for reading! I hope you enjoyed this chapter. Please feel free to leave a comment. I always love feedback!