So there are a bunch of Villain!Izuku AUs out there, but for your consideration:

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Villain!Todoroki AU. Sensei is/pretends to be a doctor at the hospital after Todoroki is burned.

***

The doctor’s voice was gentle. “No one tried to save you, did they? They looked at your father and said, ‘He’s a hero, he can’t have done anything wrong,’ and turned away. You, your mother, your siblings, all overlooked victims.”

Shouto frowned, turning his eyes away. “You shouldn’t … “

“Shouldn’t speak the truth? Because your father is too powerful?” A hand brushed through his hair. “Who made society this warped, I wonder?”

And then - “You’ve done nothing wrong, Shouto. Your father has. Let me protect you.”

“… okay,” Shouto said, exhaustion tugging at his bones. “Yeah. Okay.”

***

“Most heroes worship money?” Shou quoted in the wake of Stain’s departure, sitting down in the shade of the water tank. “How overdramatic. Some of them worship fame instead.”

Tomura snorted. “You’re still going on about Endeavor’s failings?”

“Everyone needs a hobby, Sensei says.” Shou cupped his palms together, summoning a lick of flame in the bowl of his hands. “Besides, I need something to do during the cut-scenes.”

If Yoko didn't know about Deidara, manga wise, they could have called one of the twins Itachi, don't

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Yoko probably wouldn’t name one of their kids Itachi. Itachi is a gigantic, bleeding wound in their heart. Itachi kept them sane in the years before the massacre. Itachi murdered almost everyone they loved, and ruined the ones who survived. Itachi is their brother. Itachi is the biggest threat to their continued survival.

But there is another name just as likely to set Itachi off. A name with just as much emotional pull, and much less conflicting feelings attached to it. The Uchiha with Deidara’s genes are named Yumi and Anchuu in Yoko verse canon. But in a universe a little to the left, where one of them was a boy instead, they’d be Yumi and Shisui.

***

In Deidara’s defense – okay, no, there’s nothing in Deidara’s defense except that Yoko was out on one of their technically classified intelligence assignments, and Yoko has been his voice of reason since they were like, eleven. That’s probably not going to be a good enough excuse for Yoko. Yoko is going to murder him. They’re going to murder him slowly.

But it was an explosives-related kinjutsu. Explosive clay, the perfect marriage between Deidara’s two arts. He saw the opportunity and took it, yeah? No time for second thoughts till half the village was after him.

He probably should have left Shisui with his babysitter first, admittedly. Not taken him along. Clearly, the best thing for Deidara to do is to keep running, figuring out his new kinjutsu and where to find clean diapers as he goes. Shisui’s a sturdy toddler, okay, his kid can totally handle it.

(Yoko is going to M U R D E R him.)

Itachi feels something in his brain crack when he and Kisame track down the precocious missing-nin. There were rumors about a baby, but not – not this. Not a tiny, uchiha-pale boy with a crown of black hair and an all-too-familiar curve to his cheek. Not eyes that are true-black, not brown, but black like ink, like Sasuke’s, like Itachi’s own.

Not the name, “Shisui, down!” shouted as Deidara throws a brace of kunei and scoops the boy up at a dead run.

It takes them another three days, two hundred miles, and an ambush before they catch up to Deidara again. At which point Itachi has bypassed confused, skipped irritated, and made a beeline straight to paranoid fury.

Cue the custody battle from hell. (Pein did not sign up for this, okay? Neither did the rest of the akatsuki.)