Disclaimer: I don't own any of the characters from Shadowhunters or The Mortal Instruments series they belong to Cassandra Clare. I do own characters that I create.

A/N: I'll Be There – technically is a continuation of A Love Like No Other, will be based off of Season 2. Each season however many there is will get it's own story.

ALLNO: I'll Be There

Chapter 01

In the hours after Jace disappearing Agatha and Isabelle sat in the library, Agatha reassuring Isabelle that everything was somehow going to work itself out. Magnus and Alec sat with them, talking and listening to Agatha's reassurance even if Magnus wasn't entirely sure of his sister's powers at times. Clary's mother was finally awake, so Clary was spending time with her and Luke while also still searching for Jace. Less than forty-eight hours later and Agatha was laying in her room reading and thinking of what she could possibly do to track Jace.

"Is there anything you can do?" Jocelyn questioned, as she and Clary stood in Agatha's room, they had stopped by on the way to the kitchen.

"Exactly what have you heard about me?" Agatha asked Jocelyn as she looked to Clary to find out exactly what she had told her mother.

"Clary could I talk with Agatha a moment alone?" Jocelyn looked to Agatha as she spoke, Clary looked at her mother and then at Agatha before she nodded an walked out to the hallway. Once Jocelyn was certain that Clary wasn't in hearing distance she spoke again. "Agatha, when you were a child you turned up unannounced on Luke's doorstep you must have been about five years old at the time, Luke didn't question why you were there,"

"I remember doing that, I also remember meeting you but not when I was five years old...more like when you were and Luke were still members of the Circle..." Agatha told her, remembering when she had been a teenager and somehow went backwards in time to meet her Uncle Luke before he had become a werewolf. "I can't always control my travelling, could definitely not control it as a child," Agatha continued looking at Jocelyn as she spoke. "There a lot of things I can, can't and won't do all for good reason,"

"Agatha, I do understand that. Is there a way that you can find Jace without alerting Valentine?" Jocelyn queried, Agatha shook her head even though there was something that might do it she didn't want to put her baby brother at risk.

"I'm sorry, but at this point in time I don't know if there is something if anything that I can do. Jace is my baby brother and I'm not doing a damn thing until I'm certain that he won't end up hurt," Agatha stated calmly before she told Jocelyn to leave her room. When Jocelyn refused Agatha simply closed her eyes for a brief second opening them and moving her hand ever so slightly and pushing Jocelyn out the door.

After Jace had been gone with Valentine for almost a week and Alec had been trying to organise everyone into searching for Jace and was getting very snippy at everyone including Agatha. Alec stormed out of the Institute and made it up to the roof, with Magnus and Agatha following close behind him. Agatha watched as Alec and Magnus fought, they were then called back into the ops center where they were met with the new head of the New York Institute – Clave Representative Aldertree.

"Aggie, Izzy did you know?" Alec whispered, both girls shook their heads. Agatha rested her head on the taller boys shoulder.

'No, Alec come with me – I may be able to find him...' Agatha spoke silently into Alec's head so that no one else would hear her conversation. Agatha had an idea that she didn't know if it would work or not. Alec looked to Agatha and nodded he would talk to her later.

Aldertree decided that he was going to conduct interviews with all of the Shadowhunters within the Institute, Agatha refused to talk to him going so far as to talk to Maryse first to see what she could do. Aldertree didn't quite understand the relationship between Agatha and Jace. Aldertree forbid Clary and Jocelyn from leaving the institute.

"Aunt Maryse, I can't talk to him. My relationship with Jace is complicated, you of all people know that," Agatha was standing talking to Maryse outside her bedroom door. "Jace is my brother, and Alec and I are not about to forget him you need to understand that,"

"Agatha," before Maryse could her sentence out Agatha had opened portal to Magnus, she needed her big brother.

"Magnus, I know how to find Jace...but I can't do it alone and I can't do it with anyone else at the same time, it's hard to explain," Agatha spoke quickly as she landed in Magnus' lounge room. No sooner had Agatha turned up she realised that Magnus was standing on his balcony doing his Tai-Chi. "Magnus, I'll just make myself at home than. I feel like I'll be thrown out of the institute for what I am anyway,"

Soon enough Alec had arrived and paid no attention to the fact that his best-friend was on Magnus' couch until after he had given his apology speech to the older man. Magnus smiled at him and then glanced inside at his sister who had fallen asleep within seconds of telling him her feelings.

"Agatha, doesn't feel as though she belongs at the institute any-more. She's your best-friend, Jace's sister you know otherwise," Magnus told him, before he listened to the young Shadowhunter tell him all about the feelings that he was having.

"She'll always belong, Magnus she has to know that," Alec said before he glanced into the apartment and noticed that Agatha was asleep on the couch. "How long has she been here for?"

"A few hours," Magnus answered, in the time it had taken him to start his answer he noticed that Agatha in her sleep had disappeared. "And she's gone, I don't know where but she'll be back. Alec look out for her, like she does for you,"

"I always do, she's like my sister," Alec told him, he wanted to know where Agatha had disappeared too, she couldn't have gone too far.

No sooner had Alec and Magnus finished talking then Agatha had returned from where ever it was that she had disappeared to. Alec found Agatha's arms wrapped around him and her face in his chest. Magnus looked at Agatha and saw the look on her face.

"What is it, Aggie?" Magnus questioned, Agatha shook her head refusing to budge from where she was. "Agatha, what happened?"

"No. I can't!" Agatha all but yelled into Alec's chest, Alec pulled Agatha away from him so that he could see her eyes. "Alexander, I can't not now...not ever..."

"Aggie, look at me. What did you see?" Alec questioned, he wanted to know what his best-friend had seen that terrified her so much. "I can't help you if you don't tell me,"

"No, I can't," Agatha stood her ground, and the firmer she stood the more her eyes changed. "Just promise me that you won't let anything come to Clary,"

"Agatha what did you see?" Magnus asked again, he needed to know what his little sister had seen. "Alec, go back to the institute. Agatha will be home soon," Alec refused to leave without Agatha.

"Magnus, I'm not telling. I can't," Agatha wished that her older brother and best-friend would listen to her.

Around an hour later and Agatha and Alec had returned to the institute, with Agatha refusing to talk about what she had seen when she had disappeared. In the past week she had only disappearing weeks into the future without actual reason. Isabelle could tell something had happened as soon as she saw the older girl walk into the institute.

"Aggie, Aldertree has been looking for you," Isabelle said, her arm wrapping around Agatha and Alec at the same time. "You look spooked, what happened?"

"Not now Isabelle," Alec spoke slightly pushing his younger sister away from them. "She won't even talk to me," Alec sighed, watching as Agatha pulled away from the pair of them.

"That's not a good sign," Isabelle muttered, as Agatha walked away from them and was stopped by Raj who took her to see Aldertree. "Especially if she won't talk to you,"

"I know Izzy, trust me I know...Jace is exactly the same," Alec said as he too walked away from Isabelle and headed towards his room.

Agatha stood impatiently waiting to talk to Aldertree, she really didn't want to be talking to a representative of the Clave especially Aldertree. She believed that he had ulterior motives with being the temporary head of the Institute. The door to Aldertree's office opened and he called Agatha into the room, having her close the door behind her.

"Agatha Wayland," Aldertree said, looking to the young Shadowhunter as he sat at the desk. Agatha moved her hand slightly making the curtains move.

"Yes, my name is Agatha Wayland. And yes I am Jace Wayland's older sister," Agatha spoke calmly as she looked at Aldertree.

"Have you gone on any missions with Jace Wayland?" Aldertree questioned, Agatha thought for a moment before she answered him.

"If and when I have it was only at the behest of being called upon by them. I have not as you should know been back at the institute for as long as you would think," Agatha continued to speak calmly as she looked Aldertree in the eyes.

"How closely related to Mister Wayland are you?" Aldertree queried motioning for Agatha to sit down.

"He's my half-brother. We grew up together until I was thirteen years old." Agatha paused sitting down, was she really about to tell the older man why she had all those years ago. "I know who my father is or rather was, but I can't tell you that...I'm sorry I just can't,"

"Now why is that? Is it true that you are indeed part downworlder?" Aldertree was full of questions for Agatha, none of which she actually wanted to answer but knew that she would have to. "Don't be scared to tell the truth,"

"Yes, I am part downworlder – warlock to be precise," she took a deep breathe pausing before she continued. "Also, I'm not scared. I'm annoyed," Agatha took a deep breath and closed her eyes she didn't want her warlock mark to show not now. "You have to understand that there are things that I just can't tell you. It not that I don't want to it's that I can't. I swore to the silent brothers a long time ago..." Agatha muttered the last part of the sentence before she spoke again.

Aldertree looked at Agatha, trying to decide what to do with the young Shadowhunter before him, he had hoped that she would tell him about. Aldertree had heard rumours about Agatha, and had wanted to see for himself what she was capable of doing. Agatha looked Aldertree up and down, she had a feeling that he was trying to elicit a response from her that would show her warlock nature.

"What else do you want to know?" Agatha stared at Aldertree watching as he stood up to pace the room. "I told you that Jace is my brother,"

"Are you related to Clary and Jocelyn Fairchild?" This was something that Agatha was not expecting, she didn't know how to answer this question and really wished that someone would interrupt them.

Agatha got her wish as they were interrupted by Lydia telling them that the capture of Jace had failed. Agatha stared at Lydia, thankful that she had come to the door when she had. Lydia and Agatha had come to see each other as friends, Agatha going so far as to confide in her. As Aldertree left his office, Lydia pulled Agatha to the side.

"Isabelle told me that Victor had you, he's making it clear that no downworlders are to be in the institute without his authority," Lydia told her, this Agatha knew and it was what had scared her.

"What does that mean about me? I'm a nephilim, but also a downworlder...I live in both worlds," Agatha said as they walked the hallway down to the ops center.

"He's been given strict orders that you were only to be questioned, but are free to come and go. This was at the recommendation from the Silent Brothers," Lydia told her, looking at Agatha as she breathed a sigh of relief.

"Thank you, you have no idea how much that actually means. There are things, a lot of them actually that I can't tell anyone. Not until they happen...I can't change the future..." Agatha spoke quietly as they stopped walking and arrived in the ops center, Lydia smiled at her and nodded before walking over to one of the screens. 'Jace, please don't do anything stupid,' Agatha muttered under her breath.

"What did Aldertree want?" Alec questioned, as he stood beside her with his arms crossed across his chest.

"To know just how close Jace and I were. I told him enough, Alec I couldn't tell him everything...I don't trust him," Agatha told him, as soon as the words left her mouth she found Alec's arm around her. "Alec, I don't know what to do,"

"You'll work it out, Aggie. You always do," Alec smiled at her and gave her a hug. "Iz, said she wants you to hang in her room tonight something about needing a girls night? But I'd rather it was just you and me while we do that thing,"

"Can we just hang in my room? The three of us?" Agatha queried, looking up at Alec and resting her head on his shoulder once again.

"I'll tell Izzy," Alec told her only he didn't move away from Agatha instead nudging Isabelle with his foot as she was standing a little in front of him and Agatha to the side. "Aggie's room tonight,"