Cas' mystery car ended up being a Vauxhall Corsa; Of all the damn cars in the world he got me a Corsa, may God smite his ass. So here we are, once again, on the road talking about demons, hell, the upcoming apocalypse and one more of 'Gods many missions for me'.

"So, you really want me to try and protect evil, protect a demon. Are you fucking kidding me?!" He flinched in his seat at my tone, but his face stayed in a serious mask.

"Isabella, I didn't say you needed to protect a demon. I said protect a person..."

"Who is a vessel for a powerful demon that could, when freed kill us all? Cas, it's the same damned thing." I smashed my fist into the steering wheel hard, but not hard enough to release the airbag. "How do you expect me to do this and feel free to repeat, Why?"

"The person's name is Leah and she will arrive sometime in the next week, transported by yours truly. And the reason I say she isn't a demon is because her body hasn't been taken over." He sighed, resting his arms on the dash and resting his head on top. "When she arrives, please welcome her and be nice."

"Fine, I will," I said with an undertone that wasn't missed.

"What's your condition?" He asked, sitting up. He knew I'd never go along with something like this without him being put through the same amount of suffering, if not more.

"You and you alone, will tell Sam and Dean. I want nothing to do with telling them and as you are so adamant that we must do this, you can explain. Oh, and if they refuse, I refuse."

His expression suddenly turned gloomy and his eyes haunted. "What's up Cas? Scared of a few Hunters?" I asked with a playful tone.

"Deal; I'll tell Sam and Dean and when they accept that they have to do this, you will pay." He smirked at me sideways, a look he always did before teleporting so I quickly cut in.

"Cas, stay with me for a while and let the guys sleep. Just think, if you stay with me, you can carry my bags for me." I laughed as his expression changed to a look of pure horror and he made a hasty exit, but not before promising to leave the guys alone, if only for a few hours.

I had just arrived back at the motel and was getting out of the car when Cas appeared, holding my door open.

"Thanks..." I sniggered at the look on this face when he saw the bags.

"Anyway, you spoken to the guys yet?" I asked, while grabbing the bags.

"Not yet, I was waiting for you to eventually get back and you are very slow!" He laughed and he looked almost care free. Then I realised, I'd never seen him like this with anyone other than me. Around Sam and Dean he was always serious but with me he loosened up. I kept thinking about this as we walked through the foyer, until curiosity get the better of me. I stopped and turned to face him.

"Cas," at just one word his expression changed; his face fell. "Do you mind if I ask you a question?" He perked back up with a lively "Of course!"

"Why do you act differently around me than others? You are always happy around me, and don't get me wrong, it is good to see you happy but when around anyone else you are serious. I was just wondering, why?"

He looked thoughtful for a moment before answering. "I think it's because you are so lively; you're always so happy, even when you're trying to be angry, there's a spark. It's just... who you are, it's you."

"Okay... that makes sense, I suppose..." I trailed off, probably looking the same as Cas had only seconds before.

Okay, I was going to do this easily and only add all the chapters once I'd finished but I have a problem so I started uploading. I don't know what pairing to do!

As you can tell, I have left it slightly open, so you can pick from either:

Bella/Sam

Bella/Cas

Please leave it in a review or PM me. Thanks!

The chapters may come a bit slower but hey, don't shoot the writer!