Stage 4:

It had been two months since we brought my older brother home. It was nerve wracking at times, since Tadashi would just wander if we didn't keep an eye on him. He'd go around the apartment, down the stairs near the cafe. Baymax wasn't all knowing, so while he was tending to the rest of us, Tadashi would either be right next to him… Or he'd wander off like a child who figured out that their parent couldn't catch them.

We figured out real fast that even with being Contaminated, Tadashi was still clever. He'd bust out of his restraints at night and we swear he was probably plotting the demise of the mailman.

Or at least we liked to think so.

I sighed as I helped Tadashi back upstairs for the fifteenth time that week. "Come on bro, stop being such a pain in the a-"

Tadashi had frozen in place, he was looking at something. Something I didn't notice until I heard the "click" of a gun being taken off of safety.

There was a man in our apartment. A man that was glaring at us while he had a bag in one hand, probably full of my aunt's money or her jewelry. "On your knees."

I swallowed hard and did as told. "Tadashi, kneel." I hissed at him. Tadashi didn't move though.

The man growled and walked over to him. "Did you not hear me?"

"Unnnngh…" Tadashi growled softly. It was really the only sound he could make we found out. I gulped moving to pull him down.

'Tada-"

WHACK!

My head snapped to the side when the butt of the gun hit me, pain bloomed as I cried out.

It all happened in an instant. Tadashi had lunged forward, fast, dangerously fast tackling the man to the floor pinning him. HIs shirt had moved I could see his collar from where I was.

The light was starting to flicker. Tadashi was enraged, he was punching, tearing at hair.

"TA-TADASHI NO!"

Why did I have to be alone right now? Why did I let Baymax deactivate for now…? I thought getting up and running to my brother trying to haul him off. "STOP IT! TADASHI STOP IT!"

He wasn't listening, he was in a full on rage. The rage, the hunger, the utter lack of control or empathy… That's what made him what he is now.

He wasn't a man anymore…

He was a beast.

And he was going to get electrocuted if I didn't do anything. The man under him was dazed before reaching for his gun, I reacted without thinking and reached for it and took aim.

The weakened grip let my brother go as he snarled getting up dragging the man to his feet.

"Tadashi." I said coldly. "Let. Him. Go. Calm. Down."

He only listened to part of it with a glare… Before there was a buzzing heard. The light stopped flickering between green and red and just stayed on red. Tadashi started to twitch. He was on the floor in an instant.

I felt horror go through me. I looked at my brother and the intruder before growling and took aim once more.

I had never fired a gun before in my life. Not even during the early waves of Contamination.

But this was my brother.

If Tadashi died this man was going to die too. "Get out." I snarled firing a warning shot that managed to graze the man's shoulder. He dropped our things and bolted for the stairs. I fired another shot down and dropped the gun not even waiting to see what it had hit. Although I did hear a THUD!

Tadashi was my only worry now. I bolted over to him and turned him over onto his back. He was shaking uncontrollably, his eyes rolling in the back of his head. I didn't know what else to do besides just holding him down. "HELP!"

Pleaseactivatepleaseactivatepleaseactivate…..

I heard footsteps as Baymax joined us starting to try to help Tadashi through this. It felt like it had lasted hours but it was only minutes. Tadashi was barely conscious when the collar's light finally switched to green. I could barely see, tears were blinding me. I had a death grip on his hand.

"Your okay Tadashi… I got you… It's okay…"

Baymax kept monitoring him until he declared it was safe enough to move Tadashi. It was effortless for him to carry his creator to his room but it was still eerie.

Just minutes ago Tadashi had been attacking that man with utter hatred. And now he was tucked into bed, we gave up on the restraints and if he had another episode past this… I don't want him trapped there.

"Baymax.. Is he going to be okay?" I asked my voice cracking. I couldn't pin point any one emotion, I was angry at the man for causing this, angry at Tadashi for not listening to me, scared of what I had just done with that gun and scared for my brother…

The android looked up and frowned going over to me. "Hiro… Look up…"

I looked up my eyes locking with his. "Is he…? Or is he gonna die….?"

"He won't die… That's not going to happen… He's stable Hiro… Now… Let me worry about you."

That was another thing. Baymax's personality had changed a lot since Tadashi was brought home. "That is" and "Will not" turned into "that's not" and "he won't" He just adapted. I blame the influence the Hamada family had but it wasn't an unwelcomed change.

"Okay…" I said sighing shakily. Soon I found myself sitting next to my brother's bed with ice against my face. It was quiet now, Tadashi was asleep. If I ignored that stupid horrible collar I'd think he had just been getting over the flu.

"You'd have to jam the collar or… You'd have to keep him calm. I shouldn't be telling you this but…. You can get the collar off if it starts to go active…"

I don't want that to happen again…

I know it's supposed to keep him subdued so he's not… Well not a ravaging beast but… That's Tadashi…

I didn't know what to do. I just curled up against myself and fell apart. I couldn't take it anymore.