the demon king of mha

(ch.2) all for one!

It's been over a 2 thousand years and something happened. A boy in Qing Qing China was born glowing. You were greatly interested so you extracted alot of the childs blood and experimented with it. You saw it contained tainted marechi. It wouldn't grant any benefits or increases. It was unusual. Despite that however you continued to experiment. 5 years later and a lot of people had some sort of ability. You became a doctor to study the phenomenon. These abilities were named quirks and anyone who had one was ostracized, bullied and most were thrown to the streets. One day you came across a quirk unlike any other.

Y/N: will the shigirakis come with me please.

A woman, man and Two children followed you to your office where you began to do various tests on the two kids. You left the office to go to a lab where you would study the results and blood of the two. You found both possessed a quirk but only one garnered your attention. It was a quirk that took other quirks away. From there the user could use those quirks or give them away. The implications facinated you. Furthermore you wanted to see if you could combine multiple quirks into 1 quirk. You took a drop of the blood and consumed it. Granting yourself the same quirk. You returned to the family.

Y/N: I have finished. The results are in. Young Tomura has an outstanding gift. A quirk that can take away other quirks. From there he can use them or give them away. Yoichi here... is quirkless.

3 years before canon

You were walking around at night looking for a villain to kidnap. It was later than you usually stayed out. You were about to call it quits when you smelled untainted marechi. Meaning it was a quirkless person. You followed the smell into the alleyways. You came across two individuals. One individual wielding a knife standing over another who also smelled untainted.

Y/N: finally.

The person wielding a knife looks behind and and sees a very well dressed individual.

Your killing intent was so potent it began manifesting as mist. Both people felt increasing amounts of dread and fear each step the man took towards them. Until eventually the man with the knife couldn't take it anymore and slit his own throat. He falls onto his knees dead. blood flowing from his neck. The other individual grabbed at his own neck. You stop radiating killing intent. The person begins gasping heavily for air.

Y/N: sorry about that young man. Tell me. What's your name?
???: I-Izuk-k-u m-mi-midoriya.
Y/N: well met young man. Go on home to your parents, little hero. I'll take care of things here.

Izuku scrambles to his feet and runs away. Once he's out of the alleyway you snap your fingers and a hole appears beneath both you and the body. Falling through the hole you enter the infinity castle. A space shared with other demons. A safe respite. While nothing can kill a demon but you, it's nice to have a place to avoid unwanted eyes and ears. Soon you find yourself on solid ground and a few other demons are present.

???: my lord!
Y/N: No need for that Daki my sweet.

Daki: h-huh?!
Y/N: hmhm so easy to fluster. Celestine call all the other moons here.

Celestine: yes my king.

Celestine strums a harp and a bunch of other demons fall from above.

Elsewhere

???: Is this the spot kid?
Izuku: Y-Yes sir.
???: thanks. I'll take it from here you can go home now.

Izuku leaves a scruffy, tired and decrepit man behind and heads home.

???: is this the work of that vigilante. *sigh* nezu wants to meet this guy and recruit him but I think it's stupid.

Elsewhere

You were walking through town when you bumped into a young woman and she falls to the ground. You help her up and notice her frown.

Y/N: smile my dear. Life is too much of a gift to frown.
???: what's their to smile about if everyone is mean to you.
Y/N: my you seem to be upset. Would you like me to lend an ear. It helps to share your troubles with others.
???: you'll just push me away like the others.
Y/N: hm... your hair is very pretty. Periwinkle blue is one of my favorite colors you know.

Just then you saw a small spark in the woman's eyes but it was only there for a second.

Y/N: tell you what why don't I treat you to some ice cream and you can share your troubles.
???: *hesitant* O-Okay...

You take the woman's arm and lead her to a nearby ice cream bar. On the way a group of boys and some bratty girls show up in front of you.

Random nobody 1: hey look it's nejire!
Random nobody 2: thinks she can be a hero.

The boys and girls gang on up the girl beating her down on the ground. After awhile they leave

Y/N: isn't this unfortunate miss? People like them get away with murder. Wouldn't you like to do something. Get even.

Your voice laced with honey coated venom begins to entice the young woman.

Y/N: wouldn't it be great to get back at them for every single misdeed they've committed. To finally put them in their place. Do you want unimaginable power to put everyone underneath your shoe.
Nejire: yeah... too bad it's not possible.
Y/N: it is possible. Just say yes and follow my every command.

Something snaps in nejire then and there.

Nejire: yes.

You stab a finger into nejires back and flood her system with your blood. When she can take no more you pull back your hand and her wound closes. Her body begins to fall. You catch her and carry her to an area the teens will cross. You set her down and scale the building and watch things play out. A few seconds later the teens head into the alley and see something move in the dark. Nejire begins waking up and turns feral. She sets her sights on the teens and begins to attack with overwhelming speed and strength. She massacred them and begins feasting on their flesh. One still alive chokes on his blood. He makes out another figure behind nejire. He smirks thinking she's done for but turns from smug to horrified when nejire bows before you.

Nejire: did I do good my lord?
Y/N: very well done nejire. Let's go.

You snap your fingers and all evidence falls into the infinity castle.