A/N: Thanks for reading! Sorry I've taken so long to update. I promise it won't be forever between updates.

Chapter 04

Luke looked at his niece before stepping through the portal, followed by Jace helping Alec, then Isabelle and Simon. Clary stayed with Agatha, having a feeling that the older girl might want her help in convincing them to step through the portal. Magnus went through to make sure that Alec was okay.

"Don't be scared, Willow was it? You've been through one of her portals before take your friend," Clary said, trying to be as reassuring as she could to the other red-headed girl.

"Okay..." Willow nodded, taking hold of Oz's hand and stepping through the portal and coming face to face with Isabelle smiling kindly at her. "Hey, this is Mister Giles' house,"

Once Buffy and her friends had seen that Willow was safely through with Jace communicating as much to Agatha, the remaining members of the scooby-gang stepped through the portal. Angel leaving himself for last as he wasn't sure what he was going to find on the other side. Clary rolled her eyes slightly and shrugged at Agatha before she stepped through.

"Angel, it's still dark out – you will be fine," Agatha laughed, looking at the older man before she continued. "Also, if you could hurry your ass up and step through the portal as I need to close it," Agatha took a deep breath shaking slightly as she spoke. "I can't hold it open forever, now go!"

"How do you...?" Angel started to say before he found himself being pushed through the portal to Giles' house and the portal closing behind him.

"Where's Aggie?" Isabelle questioned, rushing up to the older man and standing in front of him with her seraph blade at his throat.

"Iz, she had to close it," Jace said holding his head as a barrage of messages were sent from Agatha. "She's hiding in the library, she can't risk being seen," Jace was confused, by what he was hearing from Agatha.

"I'm still confused about the communicating with out talking thing," Xander spoke up looking at the Shadowhunter's before them trying to work it out.

"My sister is a half warlock, half nephilim," Jace said as though it explained everything about her. "She's half me, half him," Jace motioned to Magnus as though it was a cue to the older man to speak.

"What Jace is trying to say that Agatha is both my sister and his sister. She worked out how to quietly and telepathically speak to us a long time ago," Magnus tried to think of a way to explain exactly what his little sister was. "She's strong, but vulnerable she sees things that she has to keep to herself," Magnus explained, taking a breath before he continued. "Agatha's talents on occasion out weigh my own. However her emotions weigh heavily on what she can and can't do,"

"She gets scared, just like everyone," Alec muttered, his head resting on Jace's shoulder as he spoke. "Save her," he whispered in Jace's ear so that no one could hear him.

Meanwhile Agatha was hiding in Giles' office, although she had activated her deflect and agility runes praying that they would be the only ones that she would need to use. She sat listening to the approaching footsteps which seemed to both quicken and slow at the same time. Agatha couldn't risk opening a portal to Giles' as that would put everyone in danger, and she'd sent them there to get away from it.

'Aggie,' Jace thought hoping that his sister could hear him. "Magnus, what do we do?" he questioned looking at Magnus as he spoke as the warlock looked at Alec.

"Not sure, but Agatha should be able to do something," Magnus replied, sometimes his younger sister was the more crafty of the two of them.

"My niece may be talented, but are you sure she's that talented?" Luke questioned, looking at the group before them.

"Sorry...had to do things the weird way around," Agatha said as she suddenly appeared through the ceiling and the mini portal she created disappeared. "Created a portal just big enough for myself to slip through...in the floor hence the literal dropping in,"

"Aggie!" Jace quickly wrapped his arm around her before he pushed her towards Alec. "What happened?"

"Not entirely sure...I've never seen demons like them...they didn't know I was there hence the slipping through undetected," Agatha answered heading to Alec who shook his head at her and rested it on Magnus.

"They said you're only half warlock?" Giles said pointing his question towards Agatha who nodded very unsure of where he was headed with his question. "How?"

"Not a story that I'm telling ever," Magnus said speaking for his little sister. "How she came to be something that only the ones she cares about know,"

"Not a story for now," Agatha said, pausing before she continued to talk. "What was that back there?"

Giles and Wesley looked between one another, wondering if they should divulge to the teenagers before them that they were sitting on a hell-mouth and that every creature imaginable was there. Magnus and Agatha exchanged their own looks, they knew about all the creatures that existed, and some they had never seen or hadn't seen in a very long time. Magnus looked at Alec and then at Agatha motioning for her to try again.

"I can't heal Alexander while we're on a literal hell-mouth, that much I've determined," Agatha said, the look of surprise on the Buffy, Willow and Xander's faces showed that they didn't realise that the Shadowhunters knew what they were on.

"Children, don't look so surprised," Magnus said running a hand over his face before he pushed Alec into a sitting up position. "My father is Asmodeus, one of the Princes of Hell," Magnus continued, taking a deep breath as he waited for what they had to say.

"There's Princes of Hell?" Wesley questioned, as Giles picked up one of his many books to find out more.

"Yes, and you won't find them in any of your books. There are more demons than are contained in your little books," Agatha said closing her eyes and allowing the glamour to fade before her cat eyes became visible when she opened them. "Every warlock has a mark,"

"Aggie's is her eyes, the same as Magnus," Alec breathed in deep as Agatha held her hand over his shoulder and allowed her fingers to glow purple.

"There we go Agatha, you needed to be yourself," Magnus smiled at Agatha watching as Alec's wound started to close up and he didn't need the bandage any more. "It must have had something to do with the proximity to the high school,"

Agatha chose to wrap one arm around Alec as she was about to send a larger burst of magic into his shoulder. Jace looked at his sister wondering exactly what she was about to do. Clary took Jace's hand and gently pulled him towards her. Willow dragged Buffy over to the window, to talk before they were pulled away by Angel telling them it wasn't safe.

"We still don't know these people,"