I am warning you guys now I got into the show around mid to end of season 4, so Castiel is in it. Earlier episodes will most likely be flashbacks.

Isabella or Bella/Bells is Sam's twin sister, but she was born on a Thursday where Sam on a Wednesday, so Castiel is her guardian angel. Like Sam she has powers, only she is an empath. She can feel others emotions so she doesn't go on many hunts.

I am also warning you that Bella will be bitten by werewolf and become infected. Some of the wolf traits will from the 'Twilight' books. GO TEAM JACOB!

I do not own any characters but Bella. I with I did own the guy who plays Cas though!

Isabella Winchester was helping her twin brother Sam find their next job. He on his computer, her reading several papers while their oldest brother Dean slept.

Bella had to shake her head trying to block out the feeling she was getting from Dean's nightmare. His screams filled her head and made it hard to concentrate. Sam must have seen his twin's discomfort cause he went to Dean's side and shook him awake.

"Dean. DEAN! Wake up, dude."

"Jeez, Sammy quick yelling! I'm up. What's you deal?" Dean was always agitated when someone woke him up. But once Sam pointed to their sister, he instantly understood.

Dean looked up at his baby sister and saw her clutching her head with both hands, tears streaming down her face. He looked at Sam and the two went to her and wrapped their arms around her petite, but toned figure.

Bella looked at her reflection in the mirror of the hotel bathroom. She and Sam had the same brown eyes and hair like their father, John. Her hair stopped just above her shoulders and always hung in her face. She splashed some cold water on her face. Blinding searching for a towel, she didn't see a certain someone hand it to her. It wasn't until she had dried off that she saw a familiar figure with blue eyes and tan coat over a black suit staring at her in the mirror.

"Cas. How many times has Dean asked you to make little bit of noise when entering a room?"

"I lost count." He replied almost sarcastically. That got him the half smile he had to admit he loved. "Where are your brothers?"

"They went to get food. I almost had an episode." She hung the towel off the side of the sink and walked into her room, adjacent to her brothers. Sitting on her bed, running both hands through her hair. She felt him sit beside her on the bed, relishing the fact she couldn't feel his emotions like she could her brothers.

"Almost?"

"Sam woke Dean up from a nightmare he was having, before it got real bad"

Castiel always worried about Isabella when she had her episodes. As an Empath, she often got weak when emotions such as extreme sadness or pain hit. He had been her guardian angel since she was born. Before Mary Winchester had gone into labor with the twins, he appeared to her in a dream and said the younger twin had to be born on Thursday and that she would very important. So Mary made sure that her daughter was born at midnight, 10 minuets after giving birth to Sam.

He silently tucked a strand of hair that fell in Bella's face behind her ear.

"Thanks Cas."

"Your welcome." He quickly vanished just as the brothers returned with food.

"So where we to this time guys?" Bella asked from the back seat. The trio had been on the road for a few hours.

"Pennsylvania. Locals had said they've seen large wolves running around." Sam explained from the seat, grinning at his twin.

"Sam, just cause I'm 'Team Jacob' doesn't mean I'm an expert on Lycanthropy." She rolled her eyes and leaned back into the leather.

"You read more book on the subject, so to us you are the expert." Dean said in his 'smart ass' voice and turned up the cassette of AC/DC that was in the stereo.

The siblings arrived in the same town around dark and decided to wait till morning to investigate. So they all laid in Sam and Deans room, watching 'The Dark Knight' on HBO. Bella feel asleep curled up to Sam's chest. She shivered slightly, so he wrapped the comforter tighter around her and wrapped his arm around her.

Castiel watched as the Winchesters slept. Dean had his own bed, while Sam and Isabella slept together. Both slept on their sides, Sam's arm draped protectively around her waist. Having at least one of the brothers stay with her at night help with preventing nightmares. He silently moved to her side of the bed and gently stroked her hair.

She mumbled something in her sleep , but he didn't catch it.

"Castiel!" Uriel whispered harshly.

"Yes?"

"What in Father's name are you doing?"

"I'm checking in my charges. I am making sure Isabella is not suffering from nightmares, as she does almost every night."

"Your feelings for the girl are clouding you judgment." With that the angel left leaving him alone with sleeping siblings. After one last look at Bella, he too left.

BELLA'S DREAM:

Bella felt someone stroking her hair. Opening her eyes, she saw a pair of beautiful blue ones staring back at her. They were lying on a flannel blanket in a meadow. He was on his side, leaning on his elbow. Castiel smiled at her and leaned in to kiss her.

"Cas" she mumbled as his lips touched hers.

END DREAM

Bella shot up and ran a hand through her hair. Looking around the room, she saw and heard both brothers were still asleep. Lying back against her pillow, Sam tightened his hold around her waist, trying to protect her from whatever she was dreaming. She snuggled closer to her twin and feel back asleep wondering if she had feeling s for the angel.