Jagged Arrays (a Batman/Red Hood AU)
Lifelike androids are the norm -- for the higher class, that is. Child-bots that are treated like glorified tamagochi, robo-children that grow up as long as you feed them right yet don't starve if you do forget to feed them? That don't have to be watched at the pool because they can't drown? Sure. Terminator-style models? Those should be handled discreetly outside of military operations, but sure. Anything in between? Of course! Name your price and you'll find yourself with a satisfactory model.
Outside of the higher class, next to nobody can afford these outrageously expensive playthings... legally, that is. In Crime Alley, the black market for androids, parts and illegal modifications booms. Willis Todd is a mechanic and it had only been a matter of time until he had to resort to android business to get food on the table for him and his girlfriend. With the rise of androids that are able to do jobs that would've required paid workers before, the chances of scoring a legal job are at an all-time low.
One day, his girlfriend Catherine comes to him with a request: It seems she has found a banged up child robot in the streets, and she begs him to fix it for her. He can't help but oblige, knowing full well how much she has always wished for a child of her own. Crime Alley is no place to raise a child, especially not with the lack of food security, so a child-bot would be the next best thing.
And who is he to deny sweet Catherine her wish? So, after a few days of tinkering, Jason Todd is "born". They know legally registering the android child is not an option after acquiring him like that, so they go the far easier route: Registering him as their biological child.
And all is well, until it isn't... but that's life in Crime Alley four you. Catherine falls sick, Willis ends up in jail and Jason? Jason flees before CPS can catch sight of him. He can't afford to get caught, a simple checkup with a doctor would make it obvious that he's not like the other children. Lone android children don't go to orphanages, they go to the landfill.
At least his sensors and inability to actually starve give him an upper hand out in the streets... and while jacking tires. He's great at that, as it turns out. It goes well until one day, he bites off more than he can chew and attempts to jack the wheels of the batmobile. Or, well... He succeeds in jacking three of them, but gets caught upon coming back for the fourth.
He didn't know what he expected Batman to do, but taking him back to the batcave hadn't even been on the list of possibilities. Of course, it doesn't take the man long to figure out that he's not exactly made of flesh and blood, but the man's reaction to the revelation wasn't what Jason had expected either.
Knowing full well that a stray android child had nowhere to go, Batman offers to take him in.
The man offers Jason to register him legally, to which the boy reacts with the threat of running away. Batman - or Bruce, as Jason comes to find out - relents, seeing as the boy has a perfectly watertight human identity to use. What's one more family secret?
Jason, as it turns out, fits right in. Sure Dick takes his time warming up to him -- to learn that soon after moving out Bruce had taken in a robot child to play house with had stung, but interacting with his new brother quickly taught him that Jason acted a lot less robot and a lot more child that one might expect. The boy was smart, witty, and had stolen the tires off the batmobile! He could see what Bruce had seen in him that night.
It didn't take long for Jason to debut as Robin, taking to the role like a fish to water. It was amazing, really.
It was amazing, until it wasn't... but what did you expect from a Crime Alley kid? They just weren't afforded with such luck.
Bruce, the ever-worried father, had realized something: Most robot models were programmed to adhere to Asimov's rules... especially the child-bots -- yet was Jason able to go out as Robin and fight humans. He knew that Jason's coding wasn't exactly... traditional, but this realization did cause him to worry. How far did this irregularity go?
So when a diplomat's son fell to his death and Jason claimed to not have pushed him, Bruce was unsure. He had always believed that the irregularity only allowed his son to fight humans to protect others, but what if he had been mistaken? Bruce had to get to the bottom of this, so he decided to bench Robin for the foreseeable future.
Jason, meanwhile, felt hurt. And yes, maybe robots didn't compute emotions like humans did, but he had read a lot of books and couldn't help but... well, feel like those words were fitting. His own dad didn't trust him.
But maybe the one who designed him would be able to make Bruce understand! So, with newfound enthusiasm, Jason started researching and tracking down the person behind his particular model: Sheila Haywood, who currently worked in a program for medical assistance androids in Ethiopia. His "mother", for lack of a better term, made robots to help people. Ha! Take that, Bruce.
We know how this story ends... Jason leaves home to find his "mother", and he succeeds. Only is Sheila not what she appears to be. Where her "son" stands before her, all she sees is the product that she'd helped building... And realizes that she had helped building her ticket to freedom, to get away from the Joker.
Sheila would be proven wrong, but in the end that didn't matter.
What did matter was that on that day, Batman failed to save Robin, that Bruce failed to save his son.
Rich people like buying child-robots because they're durable... but even his durability, despite it far surpassing that of a human boy, couldn't save him from that blast. That day, Bruce returned home with the mangled body of a boy... and the fact that there was wiring poking out of the costume instead of bones made no difference for his grief.
Years later, there's a new player in Gotham, one who calls himself Red Hood, hiding his face under a helmet and distorting his voice with a modulator. He wears a bat on his chest yet won't hesitate to use the guns strapped to his thighs. Is he a man? Is he a robot? It's hard to tell... but what quickly becomes apparent is how dangerous he is.