BNHA Alternate Timeline: Symbiote and Friends

Inheritance

A/N this the key for the rest of the story:

Thinking, "speaking out loud", "telepathy"

On our way home, there was an explosion at an ally market.  When we went to check it out, we saw that it was the sludge villain from before.  It had taken someone hostage.

"We need to help them!" Toxin said.

"The heroes have it cov-"

"Damn! None of us have the right quirks!" said one of the heroes, Deatharms.

"You were saying?" Toxin said smugly.

"Shut it!" I snapped back.  He just laughed.

As I ran towards the villain, Toxin covered my body in what looked like a suit.  When Deatharms saw me, he said, "No you idiot, you're going to get yourself killed!"  I just ignored him and started cutting the hostage, who I could now see was a teenage girl with a very mature body, from the sludge villain.  Once I had her out, I set her down near the other heroes and then proceeded to cut up the villain like in the tunnel.  Once that was done, Toxin went back into my body as I turned to look at the heroes and the crowd.

Everybody started cheering.  Deatharms walked up to me and said, "That was amazing, but you shouldn't have just run in without a plan so recklessly!"

"I did have a plan." I said calmly, "I was actually attacked by that villain about fifteen minutes ago and stopped it the same way as I did just now."

"Still, you are not trained to be a hero.  I will let you off with just a warning this time for using your quirk in public."  He looked back at the former hostage and said, "Now I think someone wants to thank you."

I walked over to the girl and said in a kind voice, "Are you ok?"

"Yes, thanks to you," she said while blushing profusely.

"Well, I should be getting home. Goodnight." I said with a smile.  As I was leaving, news reporters kept trying to get my attention, but I just ignored them.

Toxin came out of my back and said in irritation, "Hey! Shut up!"

"Toxin, be nice," I said as if I was scolding a child.  He just grumbled and went back inside my body.  When I was almost to my street, All Might came running out from a side street saying, "I AM HERE!"  He then coughed up blood and turned into a human-looking skeleton.

"WHAT THE HELL!" I said in shock.

"Young man, what's your name?" he said causing me to sweatdrop.

"Uh...Izuku Midoriya. What happened to you?"

"I got into a fight five years back and was badly injured.  Now I can only do hero work for about three hours a day."

Toxin came out of my shoulder and said, "We can help with that."

"We can?" I asked.

"Yes, our regenerative abilities do not just apply to ourselves."

"I have tried every doctor in the world. None of them could do anything. What makes you think that you can?"

"Because I'm not from this world." Toxin said mysteriously.  Then I walked up to All Might and placed my hand on his wound.  Toxin then came out of my hand and completely covered the wound.  Within five seconds, he was completely healed.

"Holy...Stinking...SUPERCRAP!" All Might said as he turned into his 'buff' form.  "SO WHAT DID YOU MEAN BY YOU ARE NOT FROM THIS WORLD? AREN'T YOU A QUIRK?"