A/N : Important Note: In FMA-verse, this story sticks to the first anime ONLY.

(Kinda important from this chapter.)

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Chapter 5

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Spencer Reid prepared himself for the worst when they heard the sounds coming from the room. There was definitely someone there, and this time, he was sure it was the Unsub.

Hotch looked at them meaningfully. They bust in the room, all three of them:

"Freeze! FBI!"

It was unmistakably the Unsub, his figure looming over another on thrashing against the ground. Although I would've imagined him larger. Morgan turned on the light beside him. And Reid took in a sharp breath as he took in the form of their Unsub.

This can't be him! Or her... for it looked like a woman – a girl – and quite a small one at that. The profile was so completely wrong! A juvenile?

"Do not move!" repeated Hotch.

It happened in an instant, but Reid knew something was wrong when the child gave them the barest of smiles. She brought her hands forwards, as if to surrender, but at the last moment clapped them together. Before Hotch could even process what was going on, Reid had tackled him to the ground, narrowly missing the spikes that just flew out towards them.

They turned to look on her again and her smile had turned to something ugly and mocking. She clapped her hands again, and the whole floor just rose up in a tidal wave and engulfed them.

"WHAT THE - !" shouted Morgan, before he was thrown against the wall and pinned there, seemingly by the wall itself. Hotch and Reid were held by the ground – the freaking ground – restraining their hands and feet.

"HOW THE HELL IS SHE DOING THAT!"

And indeed, for the first time in his life, Dr. Spencer Reid had no possible explanation.

"Not- possible- " he said, trying to catch the wind knocked out of him.

"You shouldn't have interrupted me," the girl said, almost in a sing-song voice.

"HOW DID YOU DO THAT? " demanded Morgan, struggling against his bonds.

"Well, do you really want to know? I suggest you pay attention to this part then," she replied, clapping her hands again, and drawing out a huge iron rod, shaped as a spike. For a moment Reid thought she was about to kill them, but then she went toward the – still alive – Tom Nevy, still writhing on the ground.

"Why are you doing this?" Hotch spoke up.

"You see, its Equivalent Exchange. Their life, for mine."

And she raised the rod high above his chest.

But before she could bring it down, a loud voice echoed through the room.

"YOU!"

And Reid turned to see a fuming Edward standing in the doorway.

"Well! Look who's decided crash the party," said the girl almost sweetly, but her voice turned venomous as she added, "you never could keep your nose out of other people's business, could you?"

"What are you doing here?" Ed demanded. His eyes flicked down. "AND WHAT ARE YOU DOING TO THE KID?"

Odd, thought Reid, that he refer to someone older than himself as a kid.

"Don't you remember? This is exactly what he did to you, didn't he? Or have you forgotten the last time we met, dear mister Fullmetal Alchemist?" she spat out the name with distaste.

"Let him go," said Edward quietly, and there was an edge there that Reid had never heard before.

"Or what?" she advanced towards him.

Edward narrowed his eyes, and brought his hands together.

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Edward dodged the first few attacks easily enough, and then began his own offense. Lyra was agile and powerful, but she had never faced him in open combat before, and he sure as hell would make her regret ever being in one.

He blocked off the current wave of spikes with a shield made from the floor, and slipped out from the side as she prepared for a direct assault from him.

With a few choice movements, he had her pinned down, his blade at her throat. She can't be this easy to beat!

"I see you haven't lost your touch," she said, glaring at him.

Before anyone could blink, she jumped out from his grasp, his blade slicing through the shoulder as she did. All it showed was her rotted skin.

She clutched herself as if in pain.

"There's no Philosopher's Stone in this world! What do you want?" Ed demanded.

"Ah, and that is exactly why I must go back to ours," she replied, looking towards the open window.

She means to run!

"Give it up! You're in no state to win against me without the Stone.. Without them.. You're too weak!" challenged Ed.

"And so are you," she replied, her voice almost gleeful, as she clapped her hands to the ground.

And nothing happened. For a moment Ed couldn't figure out what she meant, but then he saw the FBI agents about to be crushed under the weight of the debris of the walls and ground that had held them, and were currently caving in on them.

Ed turned around and clapped his hands together, bringing them to the ground. He could hear the fading sound of her laughter as she jumped outside.

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Who –WHAT– was this boy?!

Spencer Reid had never seen or heard such a thing. Hell, he'd never even read of such a thing, and he read a LOT. The scientist in him even labelled it as impossible. But there he was, right before his very eyes, raising up the ground or melting the walls with just his claps, or carving out spears from the floor as if it was commonplace. Natural. But that boy defied natural as easily as Reid read 1000-page books in hours. His "automail" was unlike anything he'd ever seen before. He said he didn't belong to this country. And just what was happening right now?

Because what he could see, was that two teenagers were locked in the fiercest combat he'd ever seen. Not to mention the most unusual one. But this wasn't a normal fight. No, these kids were aiming to kill each other, and Reid could tell it by their eyes.

He could see when Ed started gaining the upper hand. He could see when the girl started eyeing the nearest escape route.

And then suddenly everything collapsed. The ground started caving in and around Hotch and him, and began crushing them. He could only imagine Morgan was facing the same situation. He couldn't breathe. But he could see a slight opening to his side where the formation wasn't as strong, and now as it started to move, it probably would have become loose. He reached an arm through and sure enough, it broke to the surface. If only I could hold on to Hotch now –

A flash of light and he could breathe again. He realized he was on the floor, covered with debris. There was Hotch to his left, and Morgan as well, not too far off. The ground was back to normal, apparently, although the classroom still looked as if a hurricane went through it.

"You okay?" Hotch asked him or Morgan, or maybe both of them.

"Yeah, where's – " he stopped short when he got his answer. Edward was right in front of them, a few feet away, sitting next to the victim.

The victim!

He couldn't believe he'd forgotten about him (although to be fair, he had witnessed something quite extraordinary) but as the three of them stood up, Edward turned around again and looked up.

"He's alive. Unconscious, and probably has some serious injuries, but nothing life-threatening," Edward told them, eyes glinting.

"What the HELL was that?!" demanded Morgan.

"The least you could do is say THANK YOU for saving your hides!" Edward replied at the same volume.

"Morgan, Edward, stop shouting," intervened Hotch, and frankly, Reid was relieved at that. "Morgan, he did save us today, as well as Tom, and we should be grateful to him. So I'm inclined to believe you Edward, but you have to tell us what all this-" he waved his hand in a sweeping gesture, "-was. You knew this Unsub, didn't you?"

Edward smirked. "That's what you want to know? I'd have thought you'd ask about the alchemy."

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A/N : I hope I didn't disappoint anyone too badly! ._. I almost changed it but then Scar would've been too cliched. The girl here was Dante/Lyra from the first anime. I kinda find her cool.
Positives? Negatives? ConCrit? Please review! :)