So I had this idea a while ago.

Where Izuku was born with a quirk and has similar powers to K.O. Like his power.



You know where he's super strong, and his punches are super powerful and his fists light up. But Izuku's fists would have green flames.

Except one day when Izuku was about 9 years old he was hit by this quirk that split his personality.
All his negative emotions manifested into a whole knew personality.

Izuku regularly gets beaten up and bullied by Bakugo. Bakugo and him used to be friends up until Bakugo got his quirk. Bakugo then had this idea that he was some how better than everyone else and his personality changed drastically. He started to be mean to Deku. Deku was the last person in his grade to get his quirk and was made fun of for being a late bloomer. One day Deku is following Bakugo and his gang into the forest.
Bakugo and his gang started making fun of Izuku which got him all worked up. Izuku punched his first in the air only for a ball of green fire to shoot out from his first and just barely miss Bakugo's head :")

Bakugo and his gang are shocked, and Izuku is kinda freaked out himself. He apologizes profusely to Bakugo for almost hurting him. But then his guilt it quickly turned into excitement as he realized that he his got his quirk! He and his mother were starting to worry that he'd never get one.

And Bakugo's gang is more than impressed with his new abilities.
Bakugo is then filled with rage and jealousy as he's not the only one with a super cool and super powerful quirk anymore. He then starts to bully Deku even more. Putting him down, convincing him that he was weak and  his quirk was no where as powerful as his. Izuku soon starts to believe Bakugo and his self esteem is very wounded.

That day Izuku had just gotten beaten up by Bakugo and his group of goons and lackies.
And he went home crying {poor brocolli boi :'( }

On his way home he encountered a villain that tried to convince him to join his side. Deku refused, but was then attacked and hit by a quirk that (as stated before) split his personality. Since he was feeling such strong negative emotions: anger, sadness, despair, longing, the personality was created from all of his negative emotions.

His new personality is similar to TKO.

At random times, especially when Izuku gets overly worked up, his personality switches to T.Deku or Evil!Deku.

His other self has the personality of villain!deku.

Izuku feels extremely discouraged because all he's ever wanted was to become a hero. But how can he do that with his new dark side?
He now tends to lash out on other people without being able to control himself. He can see everything that goes on but it is like he isn't in control of his body.
Sometimes he's his sweet, energetic self and other times he's violent, hot tempered, cold hearted and bitter. And there's absolutely nothing he can do about it.

Eventually Deku learns to live with his other half and takes UA's entrance exam, which he gets in with his powerful punching quirk.

Deku befriends Uraraka and Iida.
After that training excercize where they were divided into villains and heroes, Izuku's dark side is revealed to his new friends.

After he explained was happened to him in the past, they understand and accept him.

Difficulties he must face is learning to accept himself for who he is. Learning ticaccept both if his sides. Most of all, learning to get along with his other half and work together is a synchrony.

Much like TKO, TDeku (short for Turbo Deku) is his own person.
He has his own personality, his own flaws and his own interests.
TDeku has slightly different powers. Powers Deku can only unlock when he's very angry or emotional. He can fly, his flames are red and so are his eyes.

And like TKO, TDeku is angry at the villain for creating him and he wonders why exists in the first place. He wants to be his own person and he doesn't like the fact that its "Izuku's world and he's just living in it."

(Original quote "its KO's world and I'm just living in it" )

As a result of Deku's personality being split by his emotions, Izuku is very happy and bubbly and kind, and TDeku is angsty bitter and mean.

Izuku doesn't want to be put back together and have his personality combined again because he knows TDeku is his own person and getting rid of him would be like murder.

There are some occasions where Izuku can get angry and some where TDeku is nice.
Dispute what some think. TDeku wants to be good and he isn't evil. Just very angry. (Like Bakugou)

Eventually Bakugo hates Deku less because of TDeku. He sees that TDeku isn't weak, isn't a push over, and is willing to fight if people get on his nerves. TDeku is also sometimes seen as evil, but he can tell he isn't evil, just very angry and easily agitated (as he is the physical embodiment of Deku's negative emotions) Bakugo prefers Deku as TDeku, and actually can't stand his overly cheery self. Too bad Deku appears more being that he's the original personality.

TDeku is basically incapable of being happy yet Deku always tries to cheer him up.

Like KO and TKO they can't take control at the same time. They need to take turns being in control. However, when one is in control, the other can see what is going on through their eyes.



Eventually, they more frequently switch who is in control. To the point that they can talk right after each other. Their eyes change colour depending on who is in control (green eyes for Deku, red eyes for TDeku)

Their appearance also changes.



Izuku looks like..well...izuku



And TDeku looks like villain!deku. Red eyes and dark marks under eyes. His tone of voice it also different from Deku.

Eventually they start to learn how to work in sync.



Although it is very difficult at first.



They slowly get the hang of it as plot progresses. They are more powerful when  sync because they can access each others powers. (Basically Deku's full abilities.)

Their eyes also glow yellow. (Like a traffic light, green, red and yellow.)

Oh, and Deku and TDeku have a headspace much like KO and TKO where there's basically a mini word in his head. And his eyes are like screens which he can see the outside world through when they're not in control. And there's a little control panel they can use.

Oh, and eventually all of class 1A know about Deku's other personality. And they accept them both as individuals 😌. Although some of them ar a little scared of TDeku when he is mad.

I have a whole TDeku au in my head.
I just don't know how to put it into words :(

But if enough people want it, then I'll write it :)))
I'll try my best to form my ideas into a proper plot.

This idea for now is off limits though, in the event that I do make this into a whole MHA AU. Idk if it already exists, I've seen MHA and Ok KO crossovers, but the plot ideas are mine. And for now I'd like to keep them :))

But what do you guys think? Should I turn this into an actual fanfic?

Also, sorry typos, I was writing this as soon as the ideas popped into my head. I write my best like that...