I don't own Shingeki no Kyojin.

This is AU up to Ch. 10 and episode 9 where Eren goes insane instead of trying to save his friends.

There are spoilers up to Ch. 10 and episode 9.

Fear is the Appropriate Response

(Part 1: Where the Mind Went)

When Eren was younger, held back from the Walls, he had wanted to never back down, be strong, powerful, courageous, brave, competent, persist under pressure, willing to sacrifice himself, and be feared.

He wanted to be feared by those who broke down the Walls, killed many, took his mother away from him, and ate her. He seeks revenge from the monsters known as Titans who took thousands of lives for their satisfaction.

Now, fear is the appropriate response to his undoing.

"Eren!"

The teen's green eyes slowly opened wide and his smile that was on his face moments ago disappeared to be replaced with a gasp. Many soldiers held there 3DMG gear blades were pointed to him with disgusted and scared looks on their faces. Canons pointed down at him and Mikasa held her weapons towards the soldiers. Her eyes widen at the sight of salvia dribbling down his chin and fear in his eyes.

"Mikasa…?" he questioned and reached out to grab her then suddenly something shot right by it. His eyes widen and they both stared at the shooter, who turned out to be Jein.

"Jein? What the hell is going on?" he asked both of them and Mikasa opened her mouth to response but Jein yelled out instead.

"Kakemono!" he exclaimed, "Move another step and I'll kill you!"

Eren continued to stare at him and his eyes fell back to his hand that reached out, staring at the strands of cloth and missing piece of it. His eyes widen and fell back to the dream of both his leg and arm was eaten.

How? He thought, How is it possible that both my arm and leg regenerated?

"Eren Jaeger!" the captain, Kitts Verman, yelled, "What on Earth are you?! Human or Titan?!"

Human? Titan? Was that dream real then? Did I really transform into a Titan and killed other Titans? And I got pleasure from it?

Everything was silent and a shade cast over Eren's face. Mikasa stared at the boy as well as Armin who was the closest next to him then his eyes slowly widen when he heard a little chuckle coming from Eren. He slowly moved away and Eren sighed.

"Human or Titan?" he repeated and the captain watched with fear as Eren stood up, moving his possibly regenerated hand in front of his face, "Tell me, Captain, what do you see in front of you?"

The soldiers blinked at his response and Mikasa narrowed her eyes that. Something strange was going on and she didn't like it. Eren was acting completely different than normal and if she was correct, then she would have to force the answers out of him.

"Well, I'm waiting, Captain." Eren said and the Captain gulped, the air turned cold, "What do you see?"

"A Titan in Human skin! Trying to mock us of our inferiority!" the Captain yelled and Eren smirked to their surprise. His eyes glowed with fascination and pulled his hand back down, his smirk continued to stay on his face as he chuckled a bit that only Armin could hear him.

"Wrong." Eren answered for him and pointed to himself, "I am Human in Titan skin. I bare the machine that will exterminate all Titans. Call me a monster if you wish, chain me up, cut me to pieces, slice off my head; I will not stop at any cost. If I must climb the Walls, I will; if I must attack you, I will; if I must hurt you, I will; if I must kill you, I will."

Mikasa's eyes widen at his last part and her face held horror.

Eren would never threaten humanity unless they were like those monsters that killed her mother and father then tried to sell her into slavery for pleasure.

"Eren." Mikasa whispered and he looked to her, happiness filling them.

"Mikasa! Armin" he exclaimed and looked to his other friend, "You'll join me, right?! We'll go outside the Walls to kill them all! We'll be able to see the outside world! The dessert! The sea! Don't you want to see-!"

Suddenly he stopped short when Mikasa's blades were pointed at him, tears threatening her eyes. His eyes widen at the sight of it and his opened in a gasp.

"Mikasa…" he said and turned to Armin who now had tears streaming down his face along with quivering in fear, "You too, Armin?"

"Eren, what happened to you?" Mikasa asked and his eyes narrowed.

"What do you mean?" he asked and slowly took a step forward. Then one soldier blindly jumped out to attack him and his eyes narrowed, the blades swung to cut him in half but he ducked under and kicked the soldier beneath his legs. The soldier fell to the ground and Eren slammed his foot down on him, a mad grin across his face.

"You really think you could beat me? I'll do whatever the cost to destroy those motherfuckers even dirtying my hands with human blood and sacrifice." He stated and turned back to Mikasa, "You said you would follow me everywhere, correct? So why not now?"

"Eren," she began, "You are acting out of character from what I know. You are not being the Eren I'm familiar with."

His smile turned to a frown and took another step towards her until a gun shot was heard, blood exploded from Eren's head. Mikasa screamed a bloody murder and dropped her blades, running towards him as he fell to the ground with shock across his eyes.

"EREN!" she screamed in terror and before he fell to the ground, he narrowed his eyes at Jein with hatred a small smirk escaped his lips.

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