Sedative (Katsuki Bakugo x Reader)

Together

Your POV

He came barreling toward Izuku and me, "Say what you want! I don't care! I'm coming for my brother!" He shouted as he tried to send a punch at us.

Izuku caught his fist, replying, "You should prepare yourself. Because I guarantee you're not getting a happy ending, either!" He then used a new move, a combination of black whip and Fa Jin called 'black chain' to throw Shigaraki across the platform.

"Boosted for nothing," the villain replied as he stood, "That move's not going to work twi-"

He cut himself off when he saw me the three of us floating on pieces of rubble in the air. "Second. Transmission." Izuku used the second wielder's power to appear in front of Shigaraki. "Second Gear!" He hit Shigaraki who stayed frozen above him. "Third Gear!" Again. "Top Gear!" And on the last hit, he broke the sound barrier, shooting their platform into the ground. "Gear Shift! Overdrive! Detroit Smash! Quintuple!"

As Shigaraki was thrown into the ground, a large plume of dust kicked up, but using my quirk I could clearly see them with my eyes closed. I had gotten to a point where I didn't need to focus on one person, I could see all of them if my eyes were closed.

I watched as Shigaraki tried to anticipate Izuku's next attack, but he failed when Izuku's smoke screen was out up. I knew it was now my turn.

I stretched my hand out toward Izuku and felt a tap against my palm as he emerged from the smoke. "Bio Manipulation," I said, "Adaptation."

I felt a surge of power flow through my body down to a cellular level. I could practically see my own quirk genes adapting. It was a power I had been working on leading up to the battle. I finally found out what All for One meant when he said I had yet to realize what my powers could do. I can change my quirk genes on a cellular level to adapt and accommodate a quirk. Essentially, I can copy any quirk in my own body, and even change someone else's quirk or remove it entirely.

"This is it, All for One," I said as Izuku and I combined all the abilities of All for One. We used float to get above him as he was suspended in the air.

"Shut up, damn it!"

"Your fight is over!" Izuku continued, the two of us drawing our fists back.

"Insignifanct pests, every last one of you!" He shouted as he also readied himself for a punch.

I glared hard as I spoke firmly, "We won't allow you to hurt anybody else!"

Our fists collided in an array of colors. That was when I added my own powers into the mix. I did the same thing I had done back when we fought the first time. I used my quirk to destroy his body, and this time he couldn't fight it.

The fleshy armor blew apart. This was it. I had to decide right here and now what to do. But before Izuku or I made a move, the gaping holes in his abdomen suddenly bubbled with something fleshlike. Shigaraki screamed in pain as his body arched against his will.

Suddenly, the bubble took on the form of a human trying to burst free.  A massive blast of light and energy shot outwards from him as the protrusion screamed. I braced myself, holding up a shield in front of me and Izuku.

"This is Mandalay," I heard in my head, "The flight system stopped working! We've been hacked! Someone's taken over the controls! That's not all. The control center's currently under attack! Phantom thief is unable to continue his mission. We can't count on Erasure. I'm afraid... the worst villain in history is free!"

My heart nearly stopped upon hearing that my father and Monoma were under attack. I couldn't see them with all of the dust kicked up, which was causing me even more panic.