Disclaimer: I do not own any of the Supernatural or Harry Potter characters. I only own the new plot lines and characters added to the story.

MOD/Immortal/FemHarry

Master Occlumns/Ligilimens

Metamorphmagus

'Parseltongue'

Chapter 1 – Season 1 Episode 16 Shadow

They pull into the San Diego International Airport parking lot, the sound of the engine bouncing off the concrete walls. Finding a parking spot close to the top, they both get out, Rose pulling her bag with her. "Harry, I don't know why you wanted to go by plane. Sure, it's much faster, but how do we get these weapons through security?" John asked her, getting more frustrated by the second.

"First off, my name is Rose, John and second, we will be taking the weapons with us." She replied.

"How? It's not like we can get through with all of this, we'll be detained and arrested."

"No, we won't," Rose flicked her wrist violently letting her wand fall into her hand. She turned to look back at the car before waving the wand at the said car. John watched with amazement as he watched his vehicle shrink to the size of a toy. She bent over to grab the car before placing it in her backpack, reaching up to push her glasses up her nose.

"What was that? What did you do to my car?" he said, looking back and forth between Rose and where his car once was.

"You did read the letter I gave you right?" she looked over her shoulder at him skeptically.

"Sure, but… what the hell?" He threw his hands up.

"It was just a shrinking and feather-light spell. Nothing too major. Come, let's go, we have a plane to catch." She started walking away, causing the older man to run to catch up.

Time Skip – 5 Hours Later

Once they got to Chicago, she pulled him to the closest remote location. With a wave of her wand, the truck was back to its original size and they were off. Safely secured in the passenger seat, she held onto John's phone as she listened to his son's voicemail. The baritone voice coming through the receiver sounded almost desperate. "Hey Dad, it's Dean. We think we have a serious lead on the thing that killed mom. So, uh, this warehouse, it's 1435 West Erie. Dad if you get this, get to Chicago as soon as you can."

She closes the phone and looks up as John's pulling over. Climbing out of the car she hears yelling, then the tell-tale noise of shattering glass. She looks up just as she sees the body of a young blonde woman hit the pavement. Glass surrounding her still body, blood spreading out from the slices all over her body. She desperately wanted to go over to her, she could see the young woman's soul leaving her body. But John called out to her to get back in the car. She was silent as she sat back in her seat, John peeling off down the road. Rose didn't know how long she sat there, silent, but John suddenly turned the car into an alley, parking and getting out.

"Stay in the car," John ordered her. "I'll come back for you after I talk to my sons." His sons. Those were two people she hadn't thought of in a while. She hadn't seen either of them in years, in fact, it was over 23 years ago.

It was only a few months after Mary had been killed. John and the boys had been staying with her since the fire. John had just found out about what she was, a witch, her best guess as to who told him was Missouri. That woman had figured it out immediately after meeting Rose. They both were so lucky that Dean had been at school and Sam was only a baby, for John was yelling at her at an extreme volume. He kept blaming her for not saving Mary when she could have. Blaming her for being a Borrower and getting her powers from demons. He didn't give Rose a chance to defend herself, to explain what she was and why she couldn't save Mary. John had already aimed a gun at her with specially made bullets meant for killing witches. The look on his face told her that if she had made one slight move to do anything against him, then he would kill her without hesitation. The pain and sorrow she felt when he demanded that she leave that day was unbearable. He was even reluctant to let her say goodbye to his sons. She had spent the rest of the afternoon before Dean got back from school writing letters to John and Dean. She knew that John probably wouldn't touch his until a long time later, but she wrote it anyway. She used the letter to tell John the truth that he wouldn't let her say. It was her life story, all of it. Starting from her parents' murders, to when her Godfather Sirius blood adopted her, to the final battle and everything she did afterward. Including where she could possibly be if he needed her help. Packing all her things with a wave of her wand in her purse with an undetectable extension charm. She gave her letter to John, telling him if he wanted answers, to read the letter. Bending over and giving Dean a tight hug, his green filled with tears. She handed him his letter consisting of a way to contact her if needed and pictures of his mother. Driving away was the hardest thing she had ever done, looking in her rearview mirror seeing Dean with tears in his eyes holding onto baby Sam and his letter. John standing slightly in front of the boys in a protective, yet angry stance, his arms crossed, glaring at her car.

A bright light coming from some of the windows snap her back to the present, she brings her hand up to block the blinding light from her eyes as she climbs out of the car. She runs around to the front of the building looking for the stairs. Seeing movement at the door, she races to the bottom of the curved steps. Rose reaches the bottom of the stairs just as John gets there with who she assumes are his sons, she pulls John's right arm over her shoulders as he and his shorter son meet her.

"What the bloody hell happened?" she asked as she helped Dean carry John toward the Impala. Leaning John against the trunk of the car, Rose started looking him over, wanting to make sure he wasn't too badly hurt. She didn't get farther than his face as she was roughly pushed away from her old friend and down towards the ground.

"Who the hell are you?" Hearing the deep voice from the phone call above her head, but this time it sounded demanding.

She pulled herself up with John's help and turned around. She brushed her hair to the side and heard a gasp coming from above her head. Looking up she saw the surprised face of one Samuel Winchester, her old friend.

"Rose, what are you doing here? I thought you were in San Diego running your restaurant. How do you know my dad?" Sam said with both concern and confusion. Dean looked between Sam and Rose, a look of jealousy on his face. John, however, was looking at Rose with hidden rage.

"Wait, Sam, you know this hot chick?" Dean asked Sam, causing the brothers to look at each other.

"I do," he replied looking back at Rose, "from Stanford. Jess introduced us my Freshman year. It was Rose's Senior year."

"I thought I told you to stay away from my family." John's voice suddenly cut in. Rose looked at him.

"It's not like I knew who he was when I met him. Winchester is a very common name, John Edward." She scolded the older man, pointing a finger at him. She turned back to the tall man in front of her, reaching her arms out to give him a hug. "I haven't seen you in four years, Sam. How have you been?"

"Not all that great honestly," he said, wrapping his arms around her shoulders, gently squeezing. He lets her go, leaving a hand on her shoulder. "My dad disappeared causing Dean to come get me. Then when I get back Jess gets killed by the thing that killed my mom." He looks down after hearing a gasp from the girl in front of him.

"Jess is gone? When was this? Why wasn't I told?"

"Nobody could get ahold of you," he replied with a slight shrug. "What about my questions?"

"Um," she said, reluctant to tell him the truth. "Well, your Dad found me and asked me to help, I am working at my restaurant, and I've known your Dad since he was a teenager."

"What, how is that possible? You don't look that much younger than Sam." Dean asked.

"I am much older than I look," she replied sarcastically. Rose quickly glanced at John hoping that he would forgive her, but no matter what he said, Rose would not lie to them.

"How old are you then?"

"Oh honey, you do not ask a lady her age or her weight. It is quite rude." Sam laughed at her. "But if you must know, I am actually 86 years young." She then turned to John who looked both pissed and shocked.

"So, you were in your –"

"40s when I met your father? Yes, I was."

"Alrighty then, um, come on Dad. We don't have much time. As soon as the flare's out, they'll be back." Sam said reaching for the back door. Only to have it slammed closed by his brother.

"Wait, wait. Sam, wait. Dad, you can't come with us."

"What? What are you talking about?" Sam exclaimed both surprised and frustrated.

"You boys, you're beat to hell," John said trying to convince his eldest of otherwise.

"We'll be alright," Dean reassured him.

"Dean, we should stick together! We'll go after those –"

"Sam, listen to me!" his brother interrupted him. "We almost got dad killed in there. Don't you understand? They're not gonna stop. They're gonna try again. They're gonna use us to get to him. I mean, Meg was right. Dad's vulnerable when he's with us. He... he's stronger without us around."

"Dad... no. After everything, after all the time we spent looking for you, please. I've gotta be a part of this fight." Sam said desperately, turning to his father, wanting him to disagree with Dean.

"Sammy, this fight is just starting, and we are all gonna have a part to play. For now, you've got to trust me, son. Okay? You've got to let me go." John told him before looking at Rose who had been silent since Sam started talking again. "Let's go, Harry."

Hearing the nickname John had given her all those years ago made her look up. She nodded before following him towards his car. She heard the boys whispering her nickname and she looked over her shoulder at them. "Ya, it's what your father called me when we were younger. He hated calling me Harriet."

"I used to call our Godmother Aunty Harry," Dean said, looking at her with an accusing look.

"Ya," Rose said chuckling and shaking her head. "You could never say your R's, so it always sounded like Hawwy." She turned away from there stunned faces, waving a hand. "If you need me, Sam knows where I am." She climbs onto the running board of John's car before looking back at them. "Be careful boys," was the last thing she said before climbing into the car.