Avengers little sister

I thought you were dead

Stacey POV:

I woke up to hushed voices and a throbbing headache. Prying my eyes open, I tried to reach up and rub them - only to find my hands tied behind my back, so tight that I could feel the zip ties digging into my wrists.  In the darkness, I could just make out the figures of big people huddled in the corner of the room as they glanced over at me. 

Flashbacks flew back to me as I remember what happened. I went to grab my phone only to realize that I had lost it after the robot guy tackled me to the ground. I looked over at the group of them to see there was the guy who tackled me and two people who looked small compared to him. I stayed silent as the continued their conversation before the robot guy turned to me while the other two left. He held out a pocket knife as he did so. 

"Good. You're awake." He moved closer, kneeling in front of me , eyes locked on mine as I flinched in discomfort.
He went to cut you when there was a sound of banging from above us.
"Time to go." He grabbed me around the waist and threw me over his shoulder
I screamed, wriggling and squirming but held still in his uncomfortable grasp as he got up and began walking out the door.

He walked up stairs before heading down a tunnel, standing close to the walls and walking in perfect formation. The tunnel made a sudden turn, and the walls turned to stone. The creepy robot picked up his pace, walking towards a door at the end of the tunnel. When they pushed it open, I saw a room similar to a cell with a wooden chair in the middle. The only light coming from a small window.

Dropping me into the chair, the robot stepped back and pressed a button. A set of steel cuffs wrapped around my ankles, and just as my hands were freed, they tied a rope tightly around my waist in replacement. The robot made sure I were secure before turning towards the door.

"Don't even bother trying to escape. The rope will just cut you when you move. Beside the steel is basically unmovable. I'll send someone to keep an eye on you. One wrong move and you will be hurt severally, no hesitations." He sad over his shoulder before slamming the door shut.

Pietro POV:

"You two. Good job. Now I need you to keep an eye on the girl. Make sure she doesn't do anything stupid." Ultron told us sitting on his throne.
"Sure." Wanda said after thinking about it.

We went towards the steps that lead to the tunnel where Ultron left the girl. Wanda walked ahead as we walk in silence until reaching the end where the cell was, with the unknown young girl sitting with her head down. I exchanged a glance with Wanda as the girl took a deep breath before looking up at me and my sister. When she looked at us fully , Wanda gasped. We froze where we were. The girl looked so much like our baby sister. We had been under the impression that she had died in the bombing.

"Stacey" Wanda said, the name leaving her mouth almost a whisper, but it was heard. 
The girl looked towards my sister before turning towards me.
"How.... how do you know my name?" She asked, scared.
"Do you remember us Stace? Wanda and Pietro, we're your siblings." Wanda said.
The girl looked down as if trying to remember before looking towards us again.
"Wanda?" She said looking at Wanda.
Wanda nodded.
"Pietro?" She said looking at me.
"Yes dear sister." I smiled.
"I remember." She said looking down.

I erupted into a grin and sped towards her. She laughed as I held her tightly in my arms, not wanting to let go. I looked towards Wanda to see a smile on her face brighter then any one I had seen from her. She ran towards us and I let Stacey go before she embraced our younger sister. 

"I thought you were dead." Stacey whispered.
"We thought you were dead," Wanda replied, pulling back to look our sister in the eyes, "Where have you been all this time?" 
"I woke up after the bomb hit and I wasn't at home. I ran away when a fight started out. I hid while two people took care of it. They found me and brought me to where they live. I've been living with them since I was 3." She explained.

Wanda exchanged a glance with me. Wanda turned back to our sister and created a red ball of energy in her hand to show off her powers. I zoomed away and returned a second later. Stacey  was surprised but smiled at us. 

"Guess we all changed a lot over the past few years." She said.
"You have powers?" I asked.
"No. But I've aged since then, obviously." She said indicating to herself.
"Guess we have." I said laughing lightly.
"Can you let me free?" She asked.
"I'm afraid not." Wanda said.
Stacey Looked down.
"But we'll stay with you for as long as we can." I said.
"The ones I live with will  come for me."
"They must be important because that's why Ultron has you." 
"Ultron?" She asked.
"The robot that had you." 
She nodded.

Suddenly there was banging upstairs. Stacey jumped a bit as Wanda and I looked towards the door. We looked at each other and nodded.

"We've to go. Stay safe Stace." I said as we rushed upstairs.